Was a film distributor whose employee was employed by M0 and was employed by M1 and M2 M3
SELECT count(*) WHERE {
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M3 a ns:film.film_distributor .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}