It is indeed a hard problem, but there is some research going on in this area http://people.csail.mit.edu/nkushman/papers/naacl2013.pdf http://people.csail.mit.

It is indeed a hard problem, but there is some research going on in this area http://people.csail.mit.edu/nkushman/papers/naacl2013.pdf http://people.csail.mit.edu/nkushman/papers/naacl2013.pdf and the application is definitely worth it, because it lowers the barrier for doing "complicated" stuff for people that are not very computer-savvy