hrithikpiyush/acl-arc huggingface dataset:
In comparison , the tag set of the Buckwalter Morphological Analyzer ( Buckwalter 2004 ) used in the PATB has a core POS set of 44 tags ( CORE44 ) before morphological extension .8 Cross-linguistically , a core set containing around 12 tags is often 7 We ignore the rare `` false idafa '' construction ( Habash 2010 , p. 102 ) . 8 The 44 tags in CORE44 are based on the tokenized version of Arabic words .
A category ( s \ np ) / pp might describe an intransitive verb with a prepositional phrase complement ; it combines on the right ( / ) with a constituent with category pp , and then on the left ( \ ) with a noun phrase ( np ) that serves as its subject . We follow Lewis and Steedman ( 2014 ) in allowing a small set of generic , linguistically-plausible unary and binary grammar rules . We further add rules for combining with punctuation to the left and right and allow for the merge rule X → X X of Clark and Curran ( 2007 ) .
ture for NPi whose value is the most likely NE type . ( 7 ) NEIGHBOR : Research in lexical semantics suggests that the SC of an NP can be inferred from its distributionally similar NPs ( see Lin ( 1998a ) ) . Motivated by this observation , we create for each of NPi 's ten most semantically similar NPs a NEIGHBOR feature whose value is the surface string of the NP .
Thus syntactic and prosodic structure match when the major constituents of a sentence are roughly equal in length ; for example , the main prosodic phrase break corresponds to the subject-predicate boundary in Waiters who remember well II serve orders correctly . Discrepancies in length throw constituents off balance , and so prosodic phrasing will cross constituent boundaries in order to give the phrases similar lengths ; this is the case in Chickens were eating II the remaining green vegetables , where the subject-predicate boundary finds no prosodic correspondent .4 The most explicit version of this approach is the analysis presented in Gee and Grosjean ( 1983 ) ( henceforth G&G ) . Drawing on the psycholinguistic studies mentioned above and on aspects of the grammar of prosody outlined in Selkirk ( 1984 ) , G&G propose an algorithm for mapping syntactic structure onto a hierarchical representation of phrasing ; the rules they present accomplish this by integrating syntactic information ( e.g. constituent structure , left-toright ordering ) with information about constituent length .
In contrast , the model we propose here can be used to predict when segmentation is at all necessary . Our approach to the problem is more compatible with the empirical evidence we presented in our prior work ( Li et al. , 2014 ) where we analyzed the output of Chinese to English machine translation and found that there is no correlation between sentence length and MT quality . Rather we showed that the quality of translation was markedly inferior , compared to overall translation quality , for sentences that were translated into multiple English sentences .
In wikis every document keeps track of its own history : creating a document means to start a history , editing a document to move ahead , restoring to move back onto the history timeline , destroying a document to stop the history itself . Moreover , a sandbox is a temporary view of a document itself i.e. a sandbox can not cause a change in the history ( Cunningham and Leuf , 2001 ) . Figure 1 shows the model .
If the parse failed , then the sentence was rejected . We have since improved the interface by incorporating a capability in the recognizer to propose additional solutions in turn once the first one fails to parse ( Zue et al. 1991 ) To produce these `` N-best '' alternatives , we make use of a standard A * search algorithm ( Hart 1968 , Jelinek 1976 ) . Both the A * and the Viterbi search are left-to-right search algorithms .
Clark and Curran 's ( 2004 ) work is in parallelising an implementation of log-linear parsing on the Wall Street Journal Corpus , whereas we focus on part-of-speech tagging of a far larger and more varied web corpus , a technique more widely considered a prerequisite for corpus linguistics research . Curran ( 2003 ) 9 http://pie.usna.edu/
As Kager emphasizes , this interaction of violable constraints can yield complex surface patterns . OT therefore holds out the promise of simplifying grammars , by factoring all complex phenomena into simple surface-level constraints that partially mask one another .1 Whether this is always possible under an appropriate definition of `` simple constraints '' ( e.g. , Eisner 1997b ) is of course an empirical question .