Assertion: williams pear | /r/HasProperty | thought to date
Facets:
value: from 1765
type: TEMPORAL
Source sentences:
text: The Williams pear is thought to date from 1765 to 1770 from the yard of an Aldermaston, England, schoolmaster named Mr. John Stair, giving rise to the now-obscure synonyms 'Aldermaston' pear and 'Stairs' pear.