title: extract specific value from dictionary of list of dictionary
body: <p>I have dataset like this:</p>
  
  <pre><code>{'project-1': [{'id':'1','name':'john'},{'id':'20','name':'steve'}],
   'project-2': [{'id':'6','name':'jack'},{'id':'42','name':'anna'}]}
  </code></pre>
  
  <p>what I want to extract is the name of all people:</p>
  
  <pre><code>['john','steve','jack','anna']
  </code></pre>
  
  <p>How to get these list using python?</p>