Assertion: tailed grouse | /r/HasProperty | retreated rare bird
Facets:
value: westward
type: LOCATION
value: gradually
type: MANNER
Source sentences:
text: the Sharp-tailed Grouse, being a bird of the wild prairies and open woodlands, has gradually retreated westward as the settlements have advanced, and will soon be a rare bird, to be looked for only in the sand-hills and unsettled portions of the country.