Assertion: copper sulfate | /r/HasProperty | sprayed on the roof
Facets:
value: to prevent buildup
type: PURPOSE
value: for areas of high humidity
type: PURPOSE
value: in the same way
type: MANNER
Source sentences:
text: In the same way, for areas of high humidity where roof algae or lichens are a problem, copper sulfate may be sprayed on the roof to prevent buildup.