Who was influenced by M1 , married M4 's sibling , and was influenced by M2 and M3
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x0 ns:influence.influence_node.influenced_by M3 .
?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 ?x1 .
?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 M4 .
FILTER ( ?x0 != ?x1 ) .
FILTER ( ?x1 != M4 )
}