Assertion: callery pear | /r/AtLocation | the u.s.
Facets:
value: in the early 1900s
type: TEMPORAL
value: from asia
type: LOCATION
value: in an attempt
type: TEMPORAL
Source sentences:
text: The callery pear (Pryus calleryana) is a medium-sized tree that was introduced to the U.S. from Asia in the early 1900s in an attempt to fight the fire blight of the common pear.