question: Which character was influenced by a character 's sibling , influenced by M1 and M2 , and influenced by M3 's sibling
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:fictional_universe.fictional_character .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by ?x2 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x0 ns:influence.influence_node.influenced_by M2 .
  ?x1 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 ?x3 .
  ?x2 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 M3 .
  ?x3 a ns:fictional_universe.fictional_character .
  FILTER ( ?x1 != ?x3 ) .
  FILTER ( ?x2 != M3 )
  }