Were M3 and M5 written by M2 's employee , edited by M4 , and executive produced by a British person
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M3 ns:film.film.edited_by M4 .
M3 ns:film.film.executive_produced_by ?x0 .
M3 ns:film.film.written_by ?x1 .
M5 ns:film.film.edited_by M4 .
M5 ns:film.film.executive_produced_by ?x0 .
M5 ns:film.film.written_by ?x1
}