question: Was M4 's founder a British actor that was employed by M1 , M2 , and M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:organization.organization_founder.organizations_founded M4 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
  ?x0 ns:people.person.nationality ns:m.07ssc
  }