title: How to extract data from 'Column D' to one single column in a different sub sheet?
body: <p>I've attached the sheet - <a href="https://docs.google.com/spreadsheets/d/1p1HtLCvkqMtP8-AwViMosWChjT-BNr5SdeiPBKo7WbA/edit?usp=sharing" rel="nofollow noreferrer">Click here</a></p>
  <p>I want pull data from these three sheets - A, B, C to this sheet - 'Combined data of Column D' and only the data in Column D would be pulled.</p>
  <p>Anyone who can guide a newbie on how to do this? It'd be much appreciated!</p>