Pulling thumbnail image associated with a news article
<p>I'm not sure if I'm tagging this question right, but I know a lot of news app like Pulse, Google Currents, etc. pull in a thumbnail of a news article.  My question is, I'm assuming they are pulling in the content from the news site itself, either screen scraping or consuming a feed of some kind.  How do they know which image to pull in from the site?</p>

<p>I'm tagging this with the "android" tag because I've built a news reader app that I'd like to pull in a thumbnail image.  Thanks.</p>
