Did M1 's writer 's employer employ a film distributor 's employee
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x3 .
?x2 ns:film.writer.film M1 .
?x3 a ns:film.film_distributor
}