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