Was M2 's spouse influenced by M3 's sibling , influenced by M0 , and influenced by M1
SELECT count(*) WHERE {
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M0 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses 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 M3 .
FILTER ( ?x0 != M2 ) .
FILTER ( ?x1 != M3 )
}