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