[PDF] Top 20 Unsupervised Syntactic Alignment with Inversion Transduction Grammars

... linguistically-derived syntactic information either on the target side (Gal- ley et ...of syntactic meth- ods share a critical dependence on word ...infer syntactic correspondences between the source ... See full document

... an inversion transduc- tion grammar based restructuring of the MEANT automatic semantic frame based MT evaluation metric, which, by leveraging ITG language biases, is able to further improve upon MEANT’s ... See full document

... better alignment coverage than the constraints used in IBM statistical machine translation models on both German-English (Verbmobil corpus) and French-English (Canadian Hansards ...that unsupervised ... See full document

... using syntactic information in translation, it may in many cases be too ...Larger syntactic divergences between the two trees may require fur- ther relaxation of this constraint, and in practice we expect ... See full document

... in the midst of the common heuristics employed in sta- tistical machine translation. For example, Cherry and Lin (2007), Zhang et al. (2008), Blunsom et al. (2008), Blunsom et al. (2009), Haghighi et al. (2009), Saers ... See full document

... sulting alignment errors involve estimating two directed models in opposite directions and then intersecting their alignments – to make up for the fact that, in reality, word alignment is an inherently ... See full document

... a transduction grammar, TRAAM learns bilingual distributed representations that parallel the struc- tural composition of a transduction ...with transduction grammars, the learned represen- ... See full document

... Transduction grammars can also be induced from treebanks instead of unannotated corpora, which cuts down the vast search space by enforc- ing additional, external constraints—taking it from the realm of ... See full document

... learning alignment and translation ...linear inversion transduction grammars ( LITG s) which are linearized restrictions of inver- sion transduction grammars or (b) lin- ear ... See full document

... In this paper, we extend ITG to condition the grammar production probabilities on lexical infor- mation throughout the tree. This model is reminis- cent of lexicalization as used in modern statistical parsers, in that a ... See full document

... both Inversion Transduction Grammar and Linear Inversion Transduction Gram- mars have been shown to produce bet- ter alignments then the standard word alignment tool, we investigate how ... See full document

... Word alignment has an exponentially large search space, which often makes exact infer- ence ...that inversion transduction grammars are rea- sonable constraints for word alignment, and ... See full document

... purely unsupervised learn- ing of phrasal inversion transduction gram- mars yields significantly better translation ac- curacy than either strategy ... See full document

... Evaluation. We evaluate the alignment accu- racy of our approach using four test sets annotated at sentence-level. The two first are composed of hand aligned documents from the Europarl corpus for the ... See full document

... extracting grammars, especially for TAG formalism are ...lexicalized grammars from English Penn Treebank and there are other works based on Chen’s procedure such as Johansen (2004) and Nasr (2004) for ... See full document

... B6s, makes it possible to have in French a very useful reference work for syntactic systems based on generalized phrase-structure grammars GPSGs and unification categorial grammars UCGs,[r] ... See full document

... of syntactic categories, ...of syntactic categories in a sentence. Since syntactic categories in lexicalized grammars deter- mine the syntactic constraints of words, this expresses the ... See full document

... It has been pointed out that the DMV model is very simplistic and cannot capture many linguistic phe- nomena; therefore a few extensions of DMV have been proposed, which achieve significant improve- ment over DMV in ... See full document

... that it is easier to manually create new resources that relate LA to MSA than it is to manually cre- ate syntactically annotated corpora in LA. Our ap- proaches do not assume the existence of any anno- tated LA corpus ... See full document

... discriminative alignment mod- els, manual alignment data is required for train- ing, which is problematic for at least three ...“correct” alignment annotation for differ- ent tasks may vary: for ... See full document