question: Were M2 and M4 executive produced by a film producer 's founder 's male child 's sibling and executive produced by M3
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings ?x1 .
  ?x1 ns:people.person.gender ns:m.05zppz .
  ?x1 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x2 .
  ?x2 ns:organization.organization_founder.organizations_founded ?x3 .
  ?x3 a ns:film.producer .
  FILTER ( ?x0 != ?x1 ) .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.executive_produced_by M3 .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.executive_produced_by M3
  }