question: Were M2 and M7 influenced by a person 's Japanese sibling and influenced by M3 , M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.03_3d .
  ?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:people.person .
  FILTER ( ?x0 != ?x1 ) .
  M2 ns:influence.influence_node.influenced_by ?x0 .
  M2 ns:influence.influence_node.influenced_by M3 .
  M2 ns:influence.influence_node.influenced_by M4 .
  M2 ns:influence.influence_node.influenced_by M5 .
  M2 ns:influence.influence_node.influenced_by M6 .
  M7 ns:influence.influence_node.influenced_by ?x0 .
  M7 ns:influence.influence_node.influenced_by M3 .
  M7 ns:influence.influence_node.influenced_by M4 .
  M7 ns:influence.influence_node.influenced_by M5 .
  M7 ns:influence.influence_node.influenced_by M6
  }