question: Were M2 and M3 founded by a film editor and founded by a film producer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x1 a ns:film.editor .
  M2 ns:organization.organization.founders ?x0 .
  M2 ns:organization.organization.founders ?x1 .
  M3 ns:organization.organization.founders ?x0 .
  M3 ns:organization.organization.founders ?x1
  }