question: Did a screenwriter that was employed by M1 and founded M2 play M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  ?x0 ns:organization.organization_founder.organizations_founded M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1
  }