title: Regex to isolate a specific substring
body: <p>I have this string I have retrieved from a File.ReadAllText:</p>
  
  <pre><code>6   11 rows processed
  </code></pre>
  
  <p>As you can see there is always an integer specifying the line number in this document. What I am interested in is the integer that comes after it and the words "rows processed". So in this case I am only interested in the substring "11 rows processed".</p>
  
  <p>So, knowing that each line will start with an integer and then some white space, I need to be able to isolate the integer that follows it and the words "rows processed" and return that to a string by itself.</p>
  
  <p>I have been told this is easy to do with Regex, but so far I haven't the faintest clue how to build it.</p>