Did M2 , M5 , M6 , M7 , and M8 influence M3 and M4 and influence a Mexican person
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.nationality ns:m.0b90_r .
M2 ns:influence.influence_node.influenced ?x0 .
M2 ns:influence.influence_node.influenced M3 .
M2 ns:influence.influence_node.influenced M4 .
M5 ns:influence.influence_node.influenced ?x0 .
M5 ns:influence.influence_node.influenced M3 .
M5 ns:influence.influence_node.influenced M4 .
M6 ns:influence.influence_node.influenced ?x0 .
M6 ns:influence.influence_node.influenced M3 .
M6 ns:influence.influence_node.influenced M4 .
M7 ns:influence.influence_node.influenced ?x0 .
M7 ns:influence.influence_node.influenced M3 .
M7 ns:influence.influence_node.influenced M4 .
M8 ns:influence.influence_node.influenced ?x0 .
M8 ns:influence.influence_node.influenced M3 .
M8 ns:influence.influence_node.influenced M4
}