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