Who influenced a actor that M3 was influenced by and M4 was influenced by and was influenced by M1
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:influence.influence_node.influenced ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x1 a ns:film.actor .
?x1 ns:influence.influence_node.influenced M3 .
?x1 ns:influence.influence_node.influenced M4
}