Suggest category for a piece of text
<p>I've been searching for a opensource solution to suggest a category given a question or text.</p>

<p>For example, "who is Lady Gaga?" would probably return 'Entertainment', 'Music', or 'Celebrity'.</p>

<p>"How many strike out there are for baseball?" would give me 'Baseball', or 'Sport'.</p>

<p>The categorization doesn't have to be perfect but should be some what close.</p>

<p>Also is there anywhere I can get a list of popular categories?</p>
