Was M5 influenced by a film editor that M3 and M4 starred and M1 and M2 were edited by
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:film.actor.film/ns:film.performance.film M3 .
?x0 ns:film.actor.film/ns:film.performance.film M4 .
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
M5 ns:influence.influence_node.influenced_by ?x0
}