Corpora: complexity in question making

[DUCLAYE Florence thesard FTRD/DMI/LAN]

Hello to all of you,

As a PhD student, I am working on question answering systems with machine
learning. I am presently trying to classify the various types of questions
that a system can deal with. Ideally, this classification would take into
account features such as syntax and semantics and it would give information
about the overall complexity of questions. What types of questions are the
simplest ones, both syntactically and semantically? Which ones are more
complex?

I thank you in advance for any hints.
Florence Duclaye.