What is the capital of Puerto Rico?

Neighboring countries and their capitals:

Antigua And BarbudaSt. John'sDominicaRoseauDominican RepublicSanto DomingoHaitiPort-au-PrinceSaint Kitts And NevisBasseterreSaint LuciaCastriesSaint Vincent And The GrenadinesKingstownTurks And Caicos IslandsCockburn TownVirgin Islands (British)Road TownVirgin Islands (US)Charlotte AmalieCuraçaoWillemstadSint Maarten (Dutch part)Philipsburg