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Reranking Bilingually Extracted Paraphrases
Using Monolingual Distribu
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Paraphrasing
• Goal To use huge amount of
text to iden
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Our Approach
Bilingual Paraphrase Extrac
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Pros and Cons
Bilingual Paraphrase Extrac
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Scoring Methods
• MonoDS – Monolingual Distribu
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MonoDS
• Based on distribu
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MonoDS
• Limita
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BiP -‐ Bilingual Paraphrase Extrac
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SyntBiP – Syntac
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Bilingual Paraphrase Extrac
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BiP scores (probabili
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Paraphrasing Pipeline
Monolingual N-‐gram corpus
Context Vector Construc
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BiP scores (probabili
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huge amount of BiP SyntBiP BiP
+ MonoDS
large number of, 0.33 large
number of, 0.38 huge amount
of, 1.0
in large numbers, 0.11 great
number of, 0.09 large quan/ty
of, 0.98
great number of, 0.08 huge amount
of, 0.06 large number of, 0.98
large numbers of, 0.06 vast
number of, 0.06 great number
of, 0.97
vast number of, 0.06 vast number
of, 0.94
huge amount of, 0.06 in large
numbers, 0.10
large quan/ty of, 0.03 large
numbers of, 0.08
Example
• BiP-‐MonoDS – Less weight on
gramma
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Human Evalua
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Human Evalua
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Human Evalua
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Correla
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2
2.5
3
3.5
4
4.5
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.85
0.9
0.95 1
Meaning
Grammar
2
2.5
3
3.5
4
4.5
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.85
0.9
0.95 1
Meaning
Grammar
2
2.5
3
3.5
4
4.5
2
2.5
3
3.5
4
4.5
Thresholding by Score
BiP MonoDS
Chan, Callison-‐Burch, Van Durme
GEMS 2011
Meaning: substan
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Combining MonoDS and BiP Thresholds
• Joint Thresholding – Tighter threshold
à higher paraphrase quality –
Addi
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Effects of Bilingual Training Corpus
• Bri
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Context Influence
• {hauled, delivered}
countries which do not comply
with community legisla/on
should be hauled before the
court of jus/ce …
à MonoDS takes advantage of
context informaEon
Chan, Callison-‐Burch, Van Durme
GEMS 2011
é Meaning, Grammar
é BiP + MonoDS
ê BiP
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Context Influence
• {fiscal burden, taxes}
(1) … the member states can
reduce the fiscal
burden consis/ng of taxes and
social contribu/ons .
(2) ... and , in addi/on
, the fiscal burden in
europe has reached an all-‐/me
high of 46 %
Chan, Callison-‐Burch, Van Durme
GEMS 2011
ê Meaning, Grammar
é Meaning, Grammar
à MonoDS is more useful in
context that defines the context
vector
é BiP ê BiP + MonoDS
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MonoDS Limita
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Summary
• Presented a novel paraphrase
acquisi
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Summary
• Future direc
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Thank you
Ques
