Was M2 influenced by a person , influenced by M3 , influenced by M4 , and influenced by a actor
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x1 a ns:film.actor .
M2 ns:influence.influence_node.influenced_by ?x0 .
M2 ns:influence.influence_node.influenced_by ?x1 .
M2 ns:influence.influence_node.influenced_by M3 .
M2 ns:influence.influence_node.influenced_by M4
}