title: Identifying all the nouns in a string with RoR
body: <p>I need a helper that can identify all the nouns on a string.</p>
  
  <p>If the given string is</p>
  
  <blockquote>
    <p>I really enjoy eating tomatoes</p>
  </blockquote>
  
  <p>I should have, as result</p>
  
  <blockquote>
    <p>really, enjoy, and tomatoes</p>
  </blockquote>
  
  <p>If there is a way that I can also idetify the verbs, should be great!</p>