Was M1 a cinematographer that a producer of M0 's prequel employed
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films ?x1 .
?x1 ns:film.film.sequel M0 .
M1 a ns:film.cinematographer .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}