Assertion: fluoride | /r/HasProperty | distributed in groundwater
Facets:
value: unevenly
type: MANNER
value: vertically
type: MANNER
Source sentences:
text: The fact that fluoride is unevenly distributed in groundwater, both vertically and horizontally, means that every well has to be tested individually for fluoride in areas endemic for fluorosis: extrapolating sample tubewell tests to a larger area does not provide an accurate picture.