title: AnzographDB Documentation update needed
body: <p>Is there an error in the example given for inference of friends on the following docs page?</p>
  <p><a href="https://docs.cambridgesemantics.com/anzograph/v2.2/userdoc/inferences.htm?Highlight=inference#inference-example" rel="nofollow noreferrer">https://docs.cambridgesemantics.com/anzograph/v2.2/userdoc/inferences.htm?Highlight=inference#inference-example</a></p>
  <p>I had to place an @ before the prefix in order to get the example working.</p>
  <p>EDIT::</p>
  <p>So a good look at the TURTLE w3.org page states both PREFIX and @prefix are fine.
  But with PREFIX it appears there should not be a '.' at the end of the PREFIX line, so removing that works fine to load the ttl file as both a graph and an EXTERNAL source.</p>