Were M1 and M4 executive produced by a employee of M0 , executive produced by M2 , and written by M3
SELECT count(*) WHERE {
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
M1 ns:film.film.executive_produced_by ?x0 .
M1 ns:film.film.executive_produced_by M2 .
M1 ns:film.film.written_by M3 .
M4 ns:film.film.executive_produced_by ?x0 .
M4 ns:film.film.executive_produced_by M2 .
M4 ns:film.film.written_by M3
}