What with Answers.com

Most of the time when I pull up a keyword and the first or second word
is a link to the Wikipedia right down on the page within the first page
is the exact same thing from answers.com

I thought google didn't like duplicate content on two sites. All
answers.com does, at least it seems to me, is pull info from the
Wikipedia for the purpose of running ads.

Why doesn't it get hit by google for this?