Was a American person influenced by M2 , influenced by M3 , and influenced by M4 M0
SELECT count(*) WHERE {
M0 a ns:people.person .
M0 ns:influence.influence_node.influenced_by M2 .
M0 ns:influence.influence_node.influenced_by M3 .
M0 ns:influence.influence_node.influenced_by M4 .
M0 ns:people.person.nationality ns:m.09c7w0
}