question: Which company whose American employee wrote M3 was acquired by M1 and was acquired by M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:business.employer .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M1 .
  ?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2 .
  ?x1 ns:film.writer.film M3 .
  ?x1 ns:people.person.nationality ns:m.09c7w0
  }