question: Who influenced a film producer , was influenced by a actor , was influenced by M2 , and influenced M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced ?x1 .
  ?x0 ns:influence.influence_node.influenced M1 .
  ?x0 ns:influence.influence_node.influenced_by ?x2 .
  ?x0 ns:influence.influence_node.influenced_by M2 .
  ?x1 a ns:film.producer .
  ?x2 a ns:film.actor
  }