title: prop=extracts not returning all extracts in the WikiMedia API
body: <p>I would like to use the <a href="https://www.mediawiki.org/wiki/API%3aMain_page" rel="nofollow">wikipedia API</a> to return the extract from multiple wikipedia articles at once. I am trying, for example, the following request (I just chose the pageids randomly):</p>
  
  <p><a href="http://en.wikipedia.org/w/api.php?format=xml&amp;action=query&amp;pageids=3258248|11524059&amp;prop=extracts&amp;exsentences=1" rel="nofollow">http://en.wikipedia.org/w/api.php?format=xml&amp;action=query&amp;pageids=3258248|11524059&amp;prop=extracts&amp;exsentences=1</a></p>
  
  <p>But it only contains the extract for the first pageid, and not the second. Other properties seem not to have this limitation. For example</p>
  
  <p><a href="http://en.wikipedia.org/w/api.php?format=xml&amp;action=query&amp;pageids=3258248|11524059&amp;prop=categories" rel="nofollow">http://en.wikipedia.org/w/api.php?format=xml&amp;action=query&amp;pageids=3258248|11524059&amp;prop=categories</a></p>
  
  <p>will return the categories for both pageids. Is this a bug, or am I missing something?</p>