title: How to return only part of a line with egrep
body: <p>I have a program that returns something like this:</p>
  
  <pre><code>status: playing
  artURL: http://beta.grooveshark.com/static/amazonart/m3510922.jpg
  estimateDuration: 29400
  calculatedDuration: 293000
  albumName: This Is It
  position: 7291.065759637188
  artistName: Michael Jackson
  trackNum: 13
  vote: 0
  albumID: 3510922
  songName: Billie Jean
  artistID: 39
  songID: 24684170
  </code></pre>
  
  <p>I'm looking to extract the artist name and the song name from all this and I figured egrep would be a nice way to do it. The problem is that I have no idea how to return only part of the matching line and not the whole line.</p>
  
  <p><code>egrep "artistName"</code> obviously returns</p>
  
  <pre><code>artistName: Michael Jackson
  </code></pre>
  
  <p>I only need it to return</p>
  
  <pre><code>Michael Jackson
  </code></pre>
  
  <p>Any help would be appreciated. Thanks.</p>