Assertion: goldfish's scale | /r/HasProperty | covered by a layer of slime
Facets:
value: to help their movement
type: PURPOSE
value: often
type: TEMPORAL
Source sentences:
text: The scales of a fish are not the final layer of protection on the body of a fish; the scales are covered by a layer of slime called the epithelial layer.
text: Fish are covered in scales which are often covered in a layer of slime to help their movement through water.