Was M3 influenced by a character that M1 and M2 influenced and influenced by M4
SELECT count(*) WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
M3 ns:influence.influence_node.influenced_by ?x0 .
M3 ns:influence.influence_node.influenced_by M4
}