The Link Grammar Parser is a syntactic parser of English, Russian, Arabic
and Persian (and other languages as well), based on Link Grammar, an
original theory of syntax and morphology. Given a sentence, the system
assigns to it a syntactic structure, which consists of a set of labelled
links connecting pairs of words. The parser also produces a "constituent"
(HPSG style phrase tree) representation of a sentence (showing noun phrases,
verb phrases, etc.).