Assertion: cave | /r/HasProperty | sold by the gratz brothers
Facets:
value: to franklin gorin
type: TRANSITIVE-OBJECT
value: in the spring of 1838
type: TEMPORAL
Source sentences:
text: In the spring of 1838, the cave was sold by the Gratz brothers to Franklin Gorin, who intended to operate Mammoth Cave purely as a tourist attraction, the bottom long having since fallen out of the saltpeter market.