Was M2 influenced by a Mexican actor , influenced by M3 , and influenced by M4
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:people.person.nationality ns:m.0b90_r .
M2 ns:influence.influence_node.influenced_by ?x0 .
M2 ns:influence.influence_node.influenced_by M3 .
M2 ns:influence.influence_node.influenced_by M4
}