... Corpus Tomoharu Iwata Daichi MochihashiNTT Communication Science Laboratories2-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, Japan{iwata,daichi,sawada}@cslab.kecl.ntt.co.jpHiroshi SawadaAbstractWe ... languages, and 3) theinnate abilities of humans (Chomsky, 1965).We assume hidden commonalities in syntaxacross languages, and try to extract a commongrammar from non -parallel multilingual corpora.For ... where K is a set of nonterminals, Wlis a set of terminals, and Φlis a set of rule probabilities. Note that a set of nonterminals K is shared among languages, but a set of terminals Wl and rule...