What American executive producer of M0 , M1 , and M2 was a employee of M3
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.producer.films_executive_produced M0 .
?x0 ns:film.producer.films_executive_produced M1 .
?x0 ns:film.producer.films_executive_produced M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?x0 ns:people.person.nationality ns:m.09c7w0
}