Was M4 written by a company that was founded by M1 and was founded by M2 and M3
SELECT count(*) WHERE {
?x0 a ns:business.employer .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
?x0 ns:organization.organization.founders M3 .
M4 ns:film.film.written_by ?x0
}