To develop that you would have to get the source from . According to their facebook page they power IMDB, GOOGLE, MICROSOFT and WOLFRAMALPHA as well and they are present in 50 countries.

I am thinking google caches them AND throws the results, WOLFRAMALPHA takes time but gives you the same results and sometimes takes a long time to give you the same results and asks you to try the pro to get the same job done.
posted by [UserVoice Srinivas Medisetti] • 5 years and 3 months ago Link