Assertion: sulfur | /r/AtLocation | the surface of the earth
Facets:
value: in volcanic regions in sicily
type: LOCATION
value: in ancient times
type: TEMPORAL
Source sentences:
text: In volcanic regions in Sicily, in ancient times, it was found on the surface of the Earth, and the "Sicilian process" was used: sulfur deposits were piled and stacked in brick kilns built on sloping hillsides, with airspaces between them.