question: Were M3 , M6 , and M7 founded by a actor employed by M1 and M2 and founded by M4 and M5
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  M3 ns:organization.organization.founders ?x0 .
  M3 ns:organization.organization.founders M4 .
  M3 ns:organization.organization.founders M5 .
  M6 ns:organization.organization.founders ?x0 .
  M6 ns:organization.organization.founders M4 .
  M6 ns:organization.organization.founders M5 .
  M7 ns:organization.organization.founders ?x0 .
  M7 ns:organization.organization.founders M4 .
  M7 ns:organization.organization.founders M5
  }