I am unaware of such an API or service that exists currently so this is a vague question, my apologies.
I have a PHP script that works with Freebase and I was wondering if I can enable it so a user can ask a question on my site which will be deconstructed using natural language processing, query the Freebase API and then return an answer.
Does anyone know of an already existing tool like this that works with Freebase?
If not, does anyone know of any great Natural Language Understanding APIs that would be able to strip down a question such as "how tall is Mount Everest?" and tell my script to query "height" on the Mount Everest article on Freebase?