Was a person whose employer was acquired by a production company M1
SELECT count(*) WHERE {
?x0 ns:organization.organization.acquired_by/ns:business.acquisition.acquiring_company ?x1 .
?x1 a ns:film.production_company .
M1 a ns:people.person .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}