Assertion: penguin's nest | /r/HasProperty | lined with pebble
Facets:
Source sentences:
text: Nests are lined with pebbles, and slightly higher than the surrounding land so that if the temperature rises and the snow melts, the nest is not flooded.
text: The nest itself is a shallow scrape in the ground which may be lined with some pebbles, stones, or grass, or nestled in a clump of tussock grass (on South Georgia Island).