title: How do I extract a HTML topic heading from a web page?
body: <p>Given a page like "<a href="http://www.quora.com/What-popular-startup-advice-is-plain-wrong" rel="nofollow">What popular startup advice is plain wrong?</a>", I'd like to be able to extract the first topic under the topic heading on the upper right hand side, in this case, "Common Misconceptions". </p>
  
  <p>What's the best way for me to do this in Ruby? Is it with Nokogiri or a regex? Presumably I need to do some HTML parsing?</p>