question: Did M1 influence a film producer , influence M2 , M3 , M4 , and M5 , and influence M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  M1 ns:influence.influence_node.influenced ?x0 .
  M1 ns:influence.influence_node.influenced M2 .
  M1 ns:influence.influence_node.influenced M3 .
  M1 ns:influence.influence_node.influenced M4 .
  M1 ns:influence.influence_node.influenced M5 .
  M1 ns:influence.influence_node.influenced M6
  }