Assertion: desert | /r/HasProperty | difficult
Facets:
value: to inhabit
type: PURPOSE
value: to characterize its geology
type: PURPOSE
Source sentences:
text: This desert covers such a large area that it is difficult to characterize its geology, but limestone and calcareous soils are common.
text: Deserts are difficult environments to live in.
text: A desert is any place that is difficult to inhabit.