Hypothesis Transformation and Semantic Variability Rules Used in RTE Adrian Iftene, Alexandra Balahur-Dobrescu [email protected],[email protected]„ „ Al. I. Cuza“ University, Iasi, Al. I. Cuza“ University, Iasi, Romania Romania Faculty of Computer Science Faculty of Computer Science
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Hypothesis Transformation and Semantic Variability Rules Used in RTE
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Hypothesis Transformation and Semantic Variability Rules Used in
„„Al. I. Cuza“ University, Iasi, Al. I. Cuza“ University, Iasi, RomaniaRomania
Faculty of Computer ScienceFaculty of Computer Science
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Overview
System presentation Tools Resources Semantic variability rules Fitness calculation Results Peer-to-Peer architecture Conclusions and Future Work
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
System presentation
Resources
Initial
data
DIRT
Minipar module
Dependency trees for (T, H) pairs
LingPipe module
Named entities for (T, H) pairs
Final result
Core Module3
Core Module2
Core Module1
Acronyms
Background knowledge
Wordnet
P2P Computers
Wikipedia
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Tools - LingPipe LingPipe (http://www.alias-i.com/lingpipe) is a suite
of Java libraries for the linguistic analysis of human language. The major tools are for: Sentence Parts of Speech. Named Entities. Coreference
Example: Hypothesis from pair 111:Leloir was born in Argentina.
<ENAMEX TYPE="PERSON">Leloir</ENAMEX> was born in <ENAMEX TYPE="LOCATION">Argentina</ENAMEX>.
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Tools - MINIPAR MINIPAR (Lin, 1998) transform the text and the
hypothesis into dependency treesExample: Le Beau Serge was directed by Chabrol.
(E0(() fin C * )1 (Le ~ U 3 lex-mod (gov Le Beau Serge))2 (Beau ~ U 3 lex-mod (gov Le Beau Serge))3 (Serge Le Beau Serge N 5 s (gov direct))4 (was be be 5 be (gov direct))5 (directed direct V E0 i (gov fin))E2 (() Le Beau Serge N 5 obj (gov direct)
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Resources – DIRT (cont...)
HypothesisVerb
relation1 relation2
TextVerbrelation1 relation3
LeftSubtree
RightSubtree
RightSubtree
LeftSubtree
Pair 37:T: She was transferred again to Navy when the American Civil War began, 1861.H: The American Civil War started in 1861.
H’: The American Civil War began in 1861.
Left – left relations similarity
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Resources – DIRT (cont...)
HypothesisVerb
relation1 relation2
TextVerbrelation3 relation1
LeftSubtree
RightSubtree
LeftSubtree
RightSubtree
Pair 161:T: The demonstrators, convoked by the solidarity with Latin America committee, verbally attacked Salvadoran President Alfredo Cristiani.H: President Alfredo Cristiani was attacked by demonstrators.
H’: Demonstrators attacked President Alfredo Cristiani.
Left – right relations similarity
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Resources – eXtended WordNet
For every synonym, we check to see which word appears in the text tree, and select the mapping with the best value according to the values from eXtended WordNet (http://xwn.hlt.utdallas.edu/downloads.html)
For example, the relation between “relative” and “niece” is made with a score of 0.078652.
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Resources - Acronyms
The acronyms’ database (http://www.acronym-guide.com) helps our program in finding relations between the acronym and its meaning: “US - United States”
Adrian Iftene&Alexandra Balahur-Dobrescu – “Al.I.Cuza” University of Iasi, Romania
Resources – Background Knowledge
Argentine [is] Argentina
Chinese [in] China
Los Angeles [in] California
2 [is] two
Netherlands [is] Holland
ar |calling_code = 54 |footnotes = Argentina also has a territorial disputeArgentina', , Nación Argentina (Argentine Nation) for many
legal purposes), isin the world. Argentina occupies a continental surface area ofArgentina national football team