Hi,
You might be interested in the BuChart parser which is shipped with the
GATE framework (http://gate.ac.uk). This produces both syntactic parse
trees and a simplified QLF representation. It also includes grammar
rules specifically designed to handle questions (although I can't
remember exactly how it deals with why questions).
For example parsing the question "Who wrote Hamlet?" gives the following
representation:
qvar(e1), qatr(e1,name), person(e1), lsubj(e2,e1), write(e2),
time(e2,past), aspect(e2,simple), voice(e2,active), lobj(e2,e3),
name(e3,'Hamlet')
Here the qvar represents the entity sought by the question and you can
see that entity e1 is a person, so the question is looking for a person
as an answer.
Hope this is helpful,
Mark A. Greenwood
Suzan Verberne wrote:
> Hi all,
>
> I am a PhD student working on a question answering approach for
> why-questions.
> When looking for a semantic representation formalism, I ran into QLF
> (Alshawi, 1990). It would be great to have a tool for creating a QLF
> from a syntactic parse tree. Unfortunately, I cannot find any tools that
> can do this.
>
> Does anyone know of a tool for creating QLFs?
> Or does anyone know of any other semantic representation for which tools
> are available?
>
> Thank you for your response!
>
> Suzan Verberne
>
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