Was M2 founded by a film editor that was employed by M1 and founded by M3
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
M2 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders M3
}