Was M2 influenced by M3 , influenced by a director of M0 and M1 , and influenced by M4
SELECT count(*) WHERE {
?x0 ns:film.director.film M0 .
?x0 ns:film.director.film M1 .
M2 ns:influence.influence_node.influenced_by ?x0 .
M2 ns:influence.influence_node.influenced_by M3 .
M2 ns:influence.influence_node.influenced_by M4
}