question: Did M3 and M4 star a screenwriter whose employer acquired M1 and acquired M2
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x1 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M1 .
  ?x1 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M2 .
  M3 ns:film.film.starring/ns:film.performance.actor ?x0 .
  M4 ns:film.film.starring/ns:film.performance.actor ?x0
  }