anchor.diff:  
   [source,cypher]
   ----
  -DROP CONSTRAINT ON (p:Person) ASSERT p.id IS UNIQUE
  +DROP CONSTRAINT ON (person:Person) ASSERT person.id IS UNIQUE
   ----
   
   [source,cypher]
   ----
  -DROP CONSTRAINT ON (m:Movie) ASSERT m.id IS UNIQUE
  +DROP CONSTRAINT ON (movie:Movie) ASSERT movie.id IS UNIQUE
   ----
   
   [source,cypher]
   ----
  -MATCH (m) WHERE m:Person OR m:Movie REMOVE m.id
  +MATCH (n) WHERE n:Person OR n:Movie REMOVE n.id
   ----
   
  +////
  +Properties set: 8
  +////
  +
  
positive.code: 
  [source,cypher]
  ----
  CREATE CONSTRAINT ON (p:Person) ASSERT p.id IS UNIQUE
  ----
  
  [source,cypher]
  ----
  CREATE CONSTRAINT ON (m:Movie) ASSERT m.id IS UNIQUE
  ----
  
  Now importing the relationships is a matter of finding the nodes and then creating relationships between them.
  
negative.code: LOAD CSV WITH HEADERS FROM "movies.csv" AS csvLine
  MERGE (country:Country {name: csvLine.country})
  CREATE (movie:Movie {id: toInt(csvLine.id), title: csvLine.title, year:toInt(csvLine.year)})
  CREATE (movie)-[:MADE_IN]->(country)
  ----
  
  ////
  Nodes created: 4
  Relationships created: 3
  Properties set: 10
  ////
  
  Lastly, we create the relationships between the persons and the movies.
  Since the relationship is a many to many relationship, one actor can participate in many movies, and one movie has many actors in it.
  