Was a screenwriter whose employer acquired M2 , M3 , and M4 a person
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M2 .
?x1 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M3 .
?x1 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M4
}