Did M6 influence a art director that M1 , M2 , and M3 influenced and marry a American person
SELECT count(*) WHERE {
?x0 a ns:film.film_art_director .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x0 ns:influence.influence_node.influenced_by M3 .
?x1 a ns:people.person .
?x1 ns:people.person.nationality ns:m.09c7w0 .
FILTER ( M6 != ?x1 ) .
M6 ns:influence.influence_node.influenced ?x0 .
M6 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
}