Assertion: gill | /r/HasProperty | efficient
Facets:
value: very
type: DEGREE
value: at removing oxygen
type: OTHER
Source sentences:
text: The gills of fish are very efficient; it is estimated gills can extract about 80% oxygen dissolved in water.
text: Gills are very efficient at removing oxygen from water: there is only 1/20 the amount of oxygen present in water as in the same volume of air.