Assertion: pond | /r/CapableOf | develop severe sludge
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Untreated or poorly maintained ponds, lakes and lagoons often develop severe sludge and nutrient excess as a result of the ecosystems natural decaying process.
text: Untreated or poorly maintained ponds, lakes and lagoons often develop severe sludge and nutrients as a result of the ecosystem's natural decaying process.