Was a film director a British actor that M2 , M3 , and M4 employed
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 a ns:film.director .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
?x0 ns:people.person.nationality ns:m.07ssc
}