Was a cinematographer employed by M2 , M3 , and M4 and employed by M5 and M6 M0
SELECT count(*) WHERE {
M0 a ns:film.cinematographer .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M5 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M6
}