Did M3 influence a American star of M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film M1 .
?x0 ns:film.actor.film/ns:film.performance.film M2 .
?x0 ns:people.person.nationality ns:m.09c7w0 .
M3 ns:influence.influence_node.influenced ?x0
}