Assertion: bradford pear | /r/HasProperty | introduced into american landscape
Facets:
value: by the u.s. department of agriculture
type: OTHER
value: in 1960
type: TEMPORAL
Source sentences:
text: " The Bradford pear (Pyrus calleryana) is a beautiful, but invasive and highly destructive species, first introduced into the American landscape by the U.S. Department of Agriculture in 1960.