What application is supported by IBM research tool XTAG?

What application is supported by IBM research tool XTAG? Correct Answer Natural Language Processing

An XTAG system is a grammar development tool based on Tree Adjoining Grammar (TAG). It consists of a parser, an X-window grammar development interface, and a morphological analyser. Other tools include SNeps , AGFL, and PC KIMMO which may be employed for natural language processing.

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