Was M1 acquired by a screenwriter 's employer and acquired by M2 and M3
SELECT count(*) WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x1 a ns:film.writer .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x0 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M2 .
M1 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company M3
}