Did M3 employ a screenwriter and employ a person employed by a film producer
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x1 a ns:people.person .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
?x2 a ns:film.producer .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}