Was M2 influenced by M3 , influenced by M4 , influenced by a Mexican person , and influenced by M5
SELECT count(*) WHERE {
?x0 a ns:people.person .
?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 .
M2 ns:influence.influence_node.influenced_by M5
}