UFC 111, what is it?

UFC 111, what is it? I keep seeing that term and don't have a clue about what it is, so I check it out online.
From Wikipedia.org which advises the following upon my question, UFC 111, what is it?
UFC 111: St-Pierre vs Hardy was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on March 27, 2010 at the Prudential Center...(1). Gather.com says that the UFC 111 Big Winner is Carwin!(2).

So now I know what the UFC 111 is!




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(1) Wikipedia.org
http://en.wikipedia.org/wiki/UFC_111

(2) Gather.com
http://www.gather.com/viewArticle.action?articleId=281474978137983