Was M2 's sequel executive produced by M0 , executive produced by M1 , and executive produced by a person
SELECT count(*) WHERE {
?x0 ns:film.film.executive_produced_by ?x1 .
?x0 ns:film.film.executive_produced_by M0 .
?x0 ns:film.film.executive_produced_by M1 .
?x0 ns:film.film.prequel M2 .
?x1 a ns:people.person
}