title: Join dataframes based on partial string-match between columns
body: <p>I have a dataframe which I want to compare if they are present in another df.</p>
  
  <pre><code>after_h.sample(10, random_state=1)
  
               movie           year   ratings
  108 Mechanic: Resurrection   2016     4.0
  206 Warcraft                 2016     4.0
  106 Max Steel                2016     3.5
  107 Me Before You            2016     4.5
  </code></pre>
  
  <p>I want to compare if the above movies are present in another df.</p>
  
  <pre><code>              FILM                   Votes
  0   Avengers: Age of Ultron (2015)   4170
  1   Cinderella (2015)                 950
  2   Ant-Man (2015)                   3000 
  3   Do You Believe? (2015)            350
  4   Max Steel (2016)                  560 
  </code></pre>
  
  <p>I want something like this as my final output:</p>
  
  <pre><code>    FILM              votes
  0  Max Steel           560
  </code></pre>