Did a film editor influence a editor of M1 , M2 , and M3
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:influence.influence_node.influenced ?x1 .
?x1 ns:film.editor.film M1 .
?x1 ns:film.editor.film M2 .
?x1 ns:film.editor.film M3
}