title: Why does Freebase think that all wineries lack official websites?
body: <p>I’m trying to query for wine producers and their websites on Freebase with this query:</p>
  
  <pre><code>[{
    "/common/topic/official_website": [],
    "id": null,
    "name": null,
    "type": "/wine/wine_producer"
  }]
  </code></pre>
  
  <p>Here it is in the Freebase query editor:
  <a href="http://www.freebase.com/query?lang=%2Flang%2Fen&amp;q=%5B%7B%22%2Fcommon%2Ftopic%2Fofficial_website%22%3A%5B%5D%2C%22id%22%3Anull%2C%22name%22%3Anull%2C%22type%22%3A%22%2Fwine%2Fwine_producer%22%7D%5D" rel="nofollow">http://www.freebase.com/query?lang=%2Flang%2Fen&amp;q=%5B%7B%22%2Fcommon%2Ftopic%2Fofficial_website%22%3A%5B%5D%2C%22id%22%3Anull%2C%22name%22%3Anull%2C%22type%22%3A%22%2Fwine%2Fwine_producer%22%7D%5D</a></p>
  
  <p>Why do none of the vineyards have official websites? That seems like a unlikely coincidence. Also, none of the other properties of included types have non-null values.</p>
  
  <p>How do I tell Freebase to obtain the properties of included types in addition to the ones on the wine producer type itself?</p>