creating a commonsense knowledge base about...
TRANSCRIPT
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Creating a Commonsense Knowledge Base about Objects
Valerio Basile (University of Turin)
SAILab, Siena12/2/2020
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whoamiValerio Basile
Assistant professor @ UnitoPreviously:● PhD @ RUG Groningen● Postdoc @ Inria
Computational Semantics, Semantic Web, Natural Language Generation, Information Extraction, Linguistic Annotation, Distributional Semantics, General Knowledge Bases, Gamification, Social Media, Sentiment Analysis, Legal Informatics, Argument Mining, Social Media, Hate Speech, ...
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Robotics and Artificial Intelligence
Objects
Linguistics and Semantics
Machine Learning and Clustering
Today
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● I Motivation: The Semantics of Objects● II Objects, Knowledge and The Web● III Objects, Words and Vectors● IV Frames and Prototypical Knowledge● V Default Knowledge about Objects
Today
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Part IMotivation:
The Semantics of Objects
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5-year CHIST-ERA funded project (2014-2018)
4 EU partners
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Deploy robots in human-inhabited environments.
The robots autonomously collect real-world data.
We use information available on the Semantic Web to identify the semantics of objects.
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Perception and Identification
Robot deployments in office environments
The robot visits fixed waypoints on the map, taking full 360° RGB-D scans
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● Object classification
● Room detection
● Frame detection
● Inference
● ...
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Part IIObjects, Knowledge and The
Web
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ClassificationWhat is (not) an object?What type is an object?
What is a room?...
RelationsHow are objects related?
Where is an object?What can I do with an object?
...
Object Knowledge
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http://lod-cloud.net/
Linked Open Data
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Web KBs
● DBpediahub for LOD
● KnowRobsmaller, manually crafted, robotic-oriented
● ConceptNetlarge, automatically built, not-LOD
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The SUN database
https://groups.csail.mit.edu/vision/SUN/
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Web KBs
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Keyword Linking MethodsVector-based Contextual disambiguation
● Run String Match on the keywords● Split the missed keywords into tokens● Run String Match on the tokens● Compute the semantic similarity of each
token-entity with all the previously recognized entities
● Select the highest scoring token-entity
e.g., basket_of_banana dbr:→ Basket
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Results2,493 objects in DBpedia679 locations in DBpedia2,935 object-location relations
The SUN database
Classification
Relations
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Part IIIObjects, Words and Vectors
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Problem
Classification is good, but relations are sparse
Object Knowledge
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Distributional Relational Hypothesis
isa(E1, A) isa(E2, B) S(E1, E1) R(A, B) ?∧ ∧ →
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Semantic Relatedness
Washing_machine Ashtray
Bathroom 5 2
Bedroom 0 1
Living_room 1 6
Co-occurrence matrix Singular value decomposition
M=U ΣV *
U k ΣkV k*=M k
Low-rank approximation
NASARI: A Novel Approach to a Semantically-Aware Representation of Items(Camacho-Collados, Pilehvar and Navigli, 2015)
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Semantic SimilarityBathroom
Ashtray
Washing_machine
α
β
sim(Bathroom, Washing_machine) = cos( ) 0.71α ≈
sim(Bathroom, Ashtray) = cos( ) 0.37β ≈
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Place Classification = Cosine similarity on NASARI
+ aggregation, weighting by distance, ...
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Evluation: locatedAt
Gold standard: SUN database linked to DBpedia
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Evluation: usedFor
Gold standard: ConceptNet linked to DBpedia
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931 high confidence location relationsOnly 52 were in the gold standard setE.g.:Trivet Kitchen→Flight_bag Airport_lounge→Soap_dispenser Unisex_public_toilet→
+ many related datasets:https://project.inria.fr/aloof/data/
Results
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Object-action relation (usedFor)Extracting common sense knowledge via triple ranking using supervised and unsupervised distributional modelsS Jebbara, V Basile, E Cabrio, P Cimiano, Semantic Web 2018
Improving object detectionSemantic web-mining and deep vision for lifelong object discoveryJ Young, L Kunze, V Basile, E Cabrio, N Hawes, B CaputoRobotics and Automation, ICRA 2017
Object-location relation (locatedAt)Populating a knowledge base with object-location relations using distributional semanticsV Basile, S Jebbara, E Cabrio, P Cimiano, EKAW 2016
Distributional Relational Hypothesis
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Part IVFrames and Prototypical
Knowledge
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Problem
The distributional relational hypothesis is limited to specific relations
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Frame Semantics
FrameNet (1997), Framester (2016), Framebase (2015)
Frame name
Frame type
Frame element
role
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Frame InstanceInstance id: <fi12345>Frame type: fbframe:CookingFrame elements:● fbfe:Instrument, dbr:Knife● fbfe:Agent, dbr:Person● …
Default Knowledge Prototypical Frame Instances→=
F.I. extraction + F.I. clustering
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Knowledge Extraction
https://github.com/valeriobasile/learningbyreading
Text
(Natural Language)
Semantic
Parsing
Word Sense
Disambiguation
Entity
Linking
Discourse
Representation
Structure
DBPedia
Entities
WordNet
Synsets
Semantic
Roles
FrameNet
FramesAlignment
RDF
Triples
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Frame Instance Extraction
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Frame Similarity
Instance id: <fi12345>Frame type: fbframe:CookingFrame elements:● fbfe:Instrument,
dbr:Knife● fbfe:Agent, dbr:Person● …
Instance id: <fi67890>Frame type: fbframe:EatingFrame elements:● fbfe:Instrument,
dbr:Fork● fbfe:Agent, dbr:Person● …
frame types
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Frame Similarity
Instance id: <fi12345>Frame type: fbframe:CookingFrame elements:● fbfe:Instrument,
dbr:Knife● fbfe:Agent, dbr:Person● …
Instance id: <fi67890>Frame type: fbframe:EatingFrame elements:● fbfe:Instrument,
dbr:Fork● fbfe:Agent, dbr:Person● …
frame elements
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Frame Similarity
Measuring Frame Instance RelatednessV. Basile, R. Lopez Condori, E. Cabrio
*SEM 2018 (accepted)
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Pilot StudyText for language learners (1,653 short stories) 114,536 frame instances, 154,422 frame elements, 686 frame types, 222 roles filled by 3,398 types of concepts.Hierarchical clustering with our distance metric: complete-linkage agglomerative (SciPy)
Frame Instance Extraction and Clustering for Default Knowledge BuildingA. Shah, V. Basile, E. Cabrio, S. Kamath S.
Applications of Semantic Web technologies in Robotics - ANSWER 17
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Pilot Study
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Pilot StudyMost frequent frame type, role and element from each cluster
<http://framebase.org/fbframe/Ride_vehicle><http://framebase.org/fbfe/Vehicle><http://wordnet−rdf.princeton.edu/wn31/02837983−n>
300 triples, available at ~http://project.inria.fr/aloof/data/
Bicycle
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Part VDefault Knowledge about
Objects
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Default Knowledge about Objects
RDF dataset of common sense knowledge about objects.
Object classification, prototypical location, actions, frames...
Knowledge extracted from parsing, crowdsourcing, distributional semantics, keyword linking
http://deko.inria.fr/
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Default Knowledge about Objects
10,990 nquads (named graphs)
603 from crowdsourcing
1,221 from distributional relational hypothesis
8,046 from keyword kinking
1,120 from KNEWS/frame instance clustering
+ DeKO ontology
http://deko.inria.fr/
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Left out… but open for discussion
● Fundational distinctionsClass vs. Instance in DBpediaAsprino L., Basile V., Ciancarini P., Presutti Empirical Analysis of Foundational Distinctions in Linked Open Data (IJCAI 2018)
● Nature of prototypical relationsDefault Logic and RDF
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The End(Q/A)
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● Valerio Basile, Elena Cabrio, Fabien Gandon, Debora Nozza: Mapping Natural Language Labels to Structured Web ResourcesNL4AI 2018
● Valerio Basile, Roque Lopez Condori, Elena Cabrio:Measuring Frame Instance Relatedness.*SEM 2018
● Soufian Jebbara, Valerio Basile, Elena Cabrio, Philip Cimiano (2018): Extracting common sense knowledge via triple ranking using supervised and unsupervised distributional modelsSemantic Web
● Avijit Shah, Valerio Basile, Elena Cabrio, Sowmya Kamath S.: Frame Instance Extraction and Clustering for Default Knowledge Building. AnSWeR 2017.
● Jay Young, Valerio Basile, Markus Suchi, Lars Kunze, Nick Hawes, Markus Vincze, Barbara Caputo: Making sense of indoor spaces using semantic web mining and situated robot perceptionESWC 2017
● Jay Young, Lars Kunze, Valerio Basile, Elena Cabrio, Nick Hawes, Barbara Caputo: Semantic Web-Mining and Deep Vision for Lifelong Object Discovery. ICRA 2017
● Valerio Basile, Soufian Jebbara, Elena Cabrio, Philipp Cimiano: Populating a Knowledge Base with Object-Location Relations Using Distributional SemanticsEKAW 2016
● Jay Young, Valerio Basile, Lars Kunze, Elena Cabrio, Nick Hawes: Towards Lifelong Object Learning by Integrating Situated Robot Perception and Semantic Web MiningECAI 2016
● Valerio Basile, Elena Cabrio, Fabien Gandon: Building a General Knowledge Base of Physical Objects for Robots. ESWC 2016