question: Did M4 employ a film director influenced by M1 and influenced by M2 and M3 and employ M5
query: SELECT count(*) WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x0 ns:influence.influence_node.influenced_by M2 .
  ?x0 ns:influence.influence_node.influenced_by M3 .
  M4 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
  M4 ns:business.employer.employees/ns:business.employment_tenure.person M5
  }