Were M3 and M4 employed by a British male screenwriter 's employer
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x1 a ns:film.writer .
?x1 ns:people.person.gender ns:m.05zppz .
?x1 ns:people.person.nationality ns:m.07ssc .
M3 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M4 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}