question: What production company whose German employee and founder was employed by M3 and M4 employed M1 and M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.production_company .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  ?x0 ns:organization.organization.founders ?x1 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
  ?x1 ns:people.person.nationality ns:m.0345h
  }