anchor.diff:  WHERE{
           ?s ?p ?o.
   }
  -    
  +
   ....
   +
   We evaluate Metadata score as follows:
  
positive.code: ....
  SELECT COUNT(*) AS ?c
  WHERE {?s ?p ?o}
    
  ....
  +
  When the number of statements is not changed, we retrieve the first and
  
negative.code:   ))
  }
  LIMIT 1
  
  ....
  2.  Use HTTP URIs so that people can look up those names
  +
  