title: How to dynamically eliminate top rows?
body: <p>There is a spreadsheet table which I open in Power Query. The first column has category names such as</p>
  <pre><code>1
  Null
  Null
  Null
  2
  Null
  Null
  Null
  3
  Null
  Null
  Null
  </code></pre>
  <p>In this situation, I could remove the top 8 rows to leave only this remaining:</p>
  <pre><code>3
  Null
  Null
  Null
  </code></pre>
  <p>And succeed in isolating that specific group. However, if a null row is added to 1 or 2, then it will offset the number of rows being removed.</p>
  <p>My question: How to remove X amount of rows dynamically so it ends up with</p>
  <pre><code>3
  Null
  Null
  Null
  </code></pre>
  <p>regardless of how many rows are added or remove above?</p>