question: Who was a film editor that M6 and M7 influenced and M2 , M3 , M4 , and M5 were influenced by
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.editor .
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced M2 .
  ?x0 ns:influence.influence_node.influenced M3 .
  ?x0 ns:influence.influence_node.influenced M4 .
  ?x0 ns:influence.influence_node.influenced M5 .
  ?x0 ns:influence.influence_node.influenced_by M6 .
  ?x0 ns:influence.influence_node.influenced_by M7
  }