question: Was M1 a company founded by a employee of M0 and founded by M3 and M4
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
  M1 a ns:business.employer .
  M1 ns:organization.organization.founders ?x0 .
  M1 ns:organization.organization.founders M3 .
  M1 ns:organization.organization.founders M4
  }