"Trolleybuses in Valpara\u00EDso" . "trolleybuses" . . . "Trolleybuses in Valpara\u00EDso" . . . "Trolleybus system of Valpara\u00EDso" . "trolleybus line" . . . . . . "Valpara\u00EDso trolleybus system" . "1952" . "Valpara\u00EDso, Chile" . . . "below" . . . . . "23" . "1952-12-31" . . "1" .