title: Determine if a place with type of natural_feature is an island
body: <p>For example <code>Majorca, Balearic Islands, Spain</code> (place_id: <code>ChIJKcEGZna4lxIRwOzSAv-b67c</code>)</p>
  
  <p>has the following types:</p>
  
  <pre><code>natural_feature,
  establishment,
  geocode
  </code></pre>
  
  <p>Is it safe to assume that those types combined will always mean that the place is an island, or is there some other way to tell if the "place" is an island?</p>