title: search for an specific character in each line in one column
body: <p>I have a dataset like this:</p>
  <p><a href="https://i.stack.imgur.com/Os2Nh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Os2Nh.png" alt="enter image description here" /></a></p>
  <p>I want to search for subject fields having “Engineer” in it. Then,
  calculate average number of papers for each engineering field and Display this table with total
  authors within field information. can anyone please help me.</p>