Did M3 and M4 star a film editor influenced by M1 and influenced by M2
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
M3 ns:film.film.starring/ns:film.performance.actor ?x0 .
M4 ns:film.film.starring/ns:film.performance.actor ?x0
}