question: Was M2 founded by a American person , founded by M3 , and founded by M4
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:people.person.nationality ns:m.09c7w0 .
  M2 ns:organization.organization.founders ?x0 .
  M2 ns:organization.organization.founders M3 .
  M2 ns:organization.organization.founders M4
  }