question: Did M1 , M3 , M4 , and M5 influence M2 and influence a sibling of a screenwriter
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 a ns:film.writer .
  FILTER ( ?x0 != ?x1 ) .
  M1 ns:influence.influence_node.influenced ?x0 .
  M1 ns:influence.influence_node.influenced M2 .
  M3 ns:influence.influence_node.influenced ?x0 .
  M3 ns:influence.influence_node.influenced M2 .
  M4 ns:influence.influence_node.influenced ?x0 .
  M4 ns:influence.influence_node.influenced M2 .
  M5 ns:influence.influence_node.influenced ?x0 .
  M5 ns:influence.influence_node.influenced M2
  }