A hybrid approach for anaphora resolution in hindi
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A Hybrid Approach for
Anaphora Resolution in Hindi
By :-
Mujadia Vandan (201323602)
Krishnakant Vishwakarma (201321582)
Paper courtesy (Praveen et.al)
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Contents
What is Anaphora/Cataphora?
Types of Anaphora
Dataset
◦ Annotation scheme
Approaches
Results
Applications
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What Anaphora/ Cataphora
means?
Cataphora
Anaphora (Act of carrying back)
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Types of Anaphora
Reflexive Pronoun
{"अपने","अपना","अपनी","खदु"}Spatial/Locative Pronoun
{"वहाां","यहाां","जहाां","वहााँ"}Relative Pronoun
{"जजसका","जजससे","जो","जजसे"}Personal Pronoun
First, Second, Third person.
Event
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Data set(Hindi/Urdu Treebank)
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Annotation Scheme
Extends the SSF format by introducing the
attribute value pair ‘ref’.
ref=‘..%Sentence-id%NP(Chunk-id)’.
Ex: ref=‘..%3%NP17’
ref=‘NP5’.
Marked on PRP in SSF format.
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Approach
Hybrid Approach
◦ Rule Base (Base line)
◦ Learning Base(Decision tree, SVM)
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Hybrid System
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Rule base(Reflexive)
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Rule base(Locative)
Like this they have used different dependency(Karaka relation) to resolve relative and personal anaphora in order of (k1 >k2 >r6 >k4 >k3 >others) for personal anaphora resolution.
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Features(for Learning)
Number : singular, plural, honorific
Named Entity categories: ‘Person’, ’
Organization’ ,’Location ’ ,’ Number/Time’
Distance feature: #NP chunks and
#sentences between the pronoun and the
candidate NP.
Animacy : ‘human’, ‘animate’, ‘rest’.
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Learning Instances
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Result
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Applications
Machine Translation
Information Extraction
Summarization
And in……….almost all NLP applications
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Thank You