Assertion: hydrogen sulfide | /r/AtLocation | the 500 to 10,000 ppb range
Facets:
value: often
type: TEMPORAL
Source sentences:
text: In anoxic basins in the ocean, such as the Cariaco Trench or the Black Sea, hydrogen sulfide typically ranges from 0 to 200,000 ppb and is often in the 500 to 10,000 ppb range.