Did M3 employ a cinematographer of M0 and M1 and employ a cinematographer
SELECT count(*) WHERE {
?x0 ns:film.cinematographer.film M0 .
?x0 ns:film.cinematographer.film M1 .
?x1 a ns:film.cinematographer .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}