question: Were M1 and M4 founded by a actor and founded by M2 and M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  M1 ns:organization.organization.founders ?x0 .
  M1 ns:organization.organization.founders M2 .
  M1 ns:organization.organization.founders M3 .
  M4 ns:organization.organization.founders ?x0 .
  M4 ns:organization.organization.founders M2 .
  M4 ns:organization.organization.founders M3
  }