Wolfram Alpha: Better Response Handling

We're currently only covering one fairly specific type of response and probably need some kind of semi-smart logic to parse the response and return the most useful piece of information.

Start by locating the JavaScript code that handles Wolfram Alpha responses and inspect which response type is currently supported. The issue provides no file or test location; done would mean selecting and returning the most useful information from a broader range of responses.

Written by the indexing model from the issue text.