Did a British screenwriter 's employer employ M0 and employ M1
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
?x1 a ns:film.writer .
?x1 ns:people.person.nationality ns:m.07ssc
}