Assertion: puffin's bill | /r/CapableOf | fade to dull gray
Facets:
value: during the winter
type: TEMPORAL
Source sentences:
text: The puffin sheds its distinctive bill in the winter following the breeding season each year and its feet and bill both fade to a dull gray.
text: During the winter, the bills and feet of puffins fade to a dull gray, but each spring their beaks and feet turn a colorful orange in preparation for the breeding season.