Assertion: cavern | /r/HasProperty | photographed in late 1950s
Facets:
value: for sale at the souvenir booth
type: PURPOSE
value: by stanley long of vistascreen
type: OTHER
Source sentences:
text: In the late 1950s the cavern was photographed in 3D by Stanley Long of VistaScreen, for sale at the souvenir booth and through mail order.