Were M4 , M5 , and M6 influenced by M0 's American sibling and influenced by a British writer of M2
SELECT count(*) WHERE {
?x0 ns:people.person.nationality ns:m.09c7w0 .
?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 M0 .
?x1 ns:film.writer.film M2 .
?x1 ns:people.person.nationality ns:m.07ssc .
FILTER ( ?x0 != M0 ) .
M4 ns:influence.influence_node.influenced_by ?x0 .
M4 ns:influence.influence_node.influenced_by ?x1 .
M5 ns:influence.influence_node.influenced_by ?x0 .
M5 ns:influence.influence_node.influenced_by ?x1 .
M6 ns:influence.influence_node.influenced_by ?x0 .
M6 ns:influence.influence_node.influenced_by ?x1
}