Who influenced M1 's prequel 's prequel 's executive producer
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:influence.influence_node.influenced ?x1 .
?x1 ns:film.producer.films_executive_produced ?x2 .
?x2 ns:film.film.sequel ?x3 .
?x3 ns:film.film.sequel M1
}