question: Did M5 acquire a company whose employee and founder directed M1 , M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:business.employer .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:organization.organization.founders ?x1 .
  ?x1 ns:film.director.film M1 .
  ?x1 ns:film.director.film M2 .
  ?x1 ns:film.director.film M3 .
  ?x1 ns:film.director.film M4 .
  M5 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired ?x0
  }