Was M1 executive produced by M2 and M3 , executive produced by M4 , and produced by a production company 's employee
SELECT count(*) WHERE {
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 a ns:film.production_company .
M1 ns:film.film.executive_produced_by M2 .
M1 ns:film.film.executive_produced_by M3 .
M1 ns:film.film.executive_produced_by M4 .
M1 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}