advisor: hsin-hsi chen reporter: chi-hsin yu date: 2009.12.10 from k-cap 2009 (acm conference, 5 th...
TRANSCRIPT
Method for Extracting Commonsense Knowledge
Advisor: Hsin-Hsi ChenReporter: Chi-Hsin YuDate: 2009.12.10
From K-CAP 2009 (ACM conference, 5th
Knowledge CAPture, Begins in 2001, biennially)
Outlines
Introduction Extended WordNet Knowledge Base Proposed Method for Extracting
Commonsense Knowledge Implementation and Results Applications of Commonsense
Knowledge Conclusion
Introduction
Commonsense › An average person is assumed to have
commonsense knowledge. Including spatial, physical, social, temporal,
psychological, and others
› This knowledge is not communicated most of the time. (assumption)
Introduction (conti.)
Related Works› Expert-build: Cyc› Collaborative efforts: OpenMind project
(ConceptNet), Mindpixel project, Verbosity Some proposals link the information
obtained by the collaborative effort to known ontologies to expand and structure the commonsense knowledge
Extended WordNet Knowledge Base (XWN-KB)
XWN (eXtended WordNet) › the words in the WordNet glosses
Semantically disambiguated syntactically parsed, Part-Of-Speech tagged transformed in logic forms
Extended WordNet Knowledge Base (XWN-KB)
XWN-KB is an upper ontology built on top of Extended WordNet (XWN).› semantically parsed and transformed
into semantic triples
Proposed Method
Using › semantic information › Semi-automatic algorithm› 3 meta-rules › 27 commonsense rules
Applications of Commonsense Knowledge
Question Answering:
Text Entailment:
Specialty:專業 ; 專長
jimmies: 灑在冰淇淋上的巧克力片
Conclusion
The proposed method extracts high precision commonsense rules. › Limitation
Commonsense rule the incomplete semantic relations in
WordNet
My Opinions About Commonsense knowledge extraction
How do we define “commonsense knowledge” in definitional way? › Is it needed to have a definition? › Is it related to knowledge categorization? › 對知識分類 , 且是對沒有寫在紙上的知識分類
依假設 , 人有 commonsense, 但少明確說出來 How do we judge the extracted knowledge?
› The importance: in what perspectives?› The validness: in what context?› The usefulness : for what applications?
Should we apply operational criteria to judge the usefulness of extracted knowledge?