anchor.diff:  MATCH (actor:Actor {name: "Tom Hanks"})
   REMOVE actor:American;
   ----
  +
  +////
  +Labels removed: 1
  +////
   
   For more information on labels and related topics, see:
   
  
positive.code: RETURN actor;
  ----
  
  Now let's say we want to add another label for a node.
  Here's how to do that:
  
  
negative.code: CREATE CONSTRAINT ON (movie:Movie) ASSERT movie.title IS UNIQUE
  ----
  
  ////
  Constraints added: 1
  ////
  
  // console
  
  Note that adding the unique constraint will add an index on that property, so we won't do that separately.
  