Assertion: rattlesnake | /r/HasProperty | concentrated in southwestern united states
Facets:
value: primarily
type: DEGREE
Source sentences:
text: While most rattlers are concentrated in the southwestern United States, they extend north, east and south in diminishing numbers and varieties.
text: Rattlesnakes are primarily concentrated in the southwestern United States but species are present to the north and south of this area in diminishing numbers.