Was M1 a actor employed by M3 and M4 , employed by a production company , and employed by M5
SELECT count(*) WHERE {
?x0 a ns:film.production_company .
M1 a ns:film.actor .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company M5
}