Assertion: urea | /r/CapableOf | serve important role
Facets:
Source sentences:
text: Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.
text: Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.
text: Urea serves an important role in the metabolism of nitrogen-containing compounds by animals.
text: Urea serves an important role in the metabolism of nitrogen-containing compounds by animals.