title: R regex to remove anything after second occurance of / in data frame column
body: <p>I have data stored in a <code>dataframe</code> column that looks like this:</p>
  
  <pre><code>/travel
  /food and drink/restaurants
  /food and drink
  /sports/outdoors/climbing
  
  /news
  /family
  </code></pre>
  
  <p>Each row has some number of "/" but they always start with a "/".  Some lines are also blank.  I just need to convert this data to only include the text after the first "/" but before the second "/".  I also want to capitalize the first letter of each word of the result.  So I'd hope the result to look like this:</p>
  
  <pre><code>Travel
  Food And Drink
  Food And Drink
  Sports
  
  News
  Family
  </code></pre>