question: Were M2 , M3 , and M4 influenced by a character 's British sibling
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.07ssc .
  ?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:fictional_universe.fictional_character .
  FILTER ( ?x0 != ?x1 ) .
  M2 ns:influence.influence_node.influenced_by ?x0 .
  M3 ns:influence.influence_node.influenced_by ?x0 .
  M4 ns:influence.influence_node.influenced_by ?x0
  }