question: Did M1 , M2 , M3 , and M4 found a company
query: SELECT count(*) WHERE {
  ?x0 a ns:business.employer .
  M1 ns:organization.organization_founder.organizations_founded ?x0 .
  M2 ns:organization.organization_founder.organizations_founded ?x0 .
  M3 ns:organization.organization_founder.organizations_founded ?x0 .
  M4 ns:organization.organization_founder.organizations_founded ?x0
  }