Assertion: calcium oxide | /r/ObjectUse | used to limelake waters
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Calcium oxide is often used to "lime" lake waters that have been acidified by acid rain.
text: Calcium oxide is frequently used to "lime" lake waters that have been acidified by acid rain it reacts with them and neutralizes acids in the lake.
text: Calcium oxide is often used to "lime" lake waters that have been acidified by acid rain.