title: How to find a Wikidata entity by property?
body: <p>I would like to know, is there a way to find a Wikidata entity by specified property using their API. For example, there are plenty entities that have Freebase ID property (Property:P646). It's unique identifier and I want to get an entity by this identifier.</p>
  
  <p>Anyone know how to achieve this? </p>