title: Extracting Wikipedia entries from text
body: <p>I have a large text, and I want to parse this text and identify (e.g. wikipedia entries that exist within this text).</p>
  
  <p>I thought of using regular expression, something like:</p>
  
  <pre><code>pattern='New York|Barak Obama|Russian Federation|Olympic Games'
  re.findall(pattern,text)
  </code></pre>
  
  <p>... etc, but this would be millions of characters long, and re doesn't accept that...</p>
  
  <p>The other way I thought about was to tokenize my text and search wikipedia entries for each token, but this doesn't look very efficient, especially if my text is too big...</p>
  
  <p>Any ideas how to do this in Python?</p>