Assertion: mallard's body | /r/HasProperty | efficient
Facets:
value: for streamlined swimming
type: PURPOSE
value: for preserving
type: PURPOSE
Source sentences:
text: Body Shape: Ducks have a compact body that is efficient for streamlined swimming and preserving body heat when immersed in water.
text: Ducks have a compact body that is efficient for streamlined swimming and preserving body heat when immersed in water.