question: What was a production company whose employee was influenced by M2 , was influenced by M3 and M4 , and influenced M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.production_company .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x1 ns:influence.influence_node.influenced M1 .
  ?x1 ns:influence.influence_node.influenced_by M2 .
  ?x1 ns:influence.influence_node.influenced_by M3 .
  ?x1 ns:influence.influence_node.influenced_by M4
  }