Assertion: magnesium sulfate's sulfur | /r/HasProperty | mined in poorer nations
Facets:
value: from surface deposits
type: LOCATION
value: with volcanoes, such as indonesia
type: OTHER
Source sentences:
text: Sulfur is still mined from surface deposits in poorer nations with volcanoes, such as Indonesia, and worker conditions have not improved much since Booker T. Washington's days.