for $d in Root('/PersonDB/Person') 
return $d/Person/City/text() 

  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat
  Paris
  London
  New York
  Toronto
  Sydney
  Vancouver
  Spuzzum
  Okotoks
  Calgary
  Medicine Hat