Assertion: fern | /r/HasProperty | established
Facets:
value: well
type: DEGREE
value: before the age of the dinosaur
type: TEMPORAL
value: with the boston fern
type: OTHER
Source sentences:
text: If ferns are planted late in the season in these areas, the roots could very well rot before they are established.
text: They were well established before the age of the dinosaur, with the Boston fern a descendant of one of the oldest known plants on Earth.