Was a production company whose child was founded by M0 and M1 and employed a film editor M3
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:organization.organization.founders M0 .
?x0 ns:organization.organization.founders M1 .
?x1 a ns:film.editor .
M3 a ns:film.production_company .
M3 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x0
}