Assertion: leech | /r/ObjectUse | used in medicine
Facets:
value: for over 2,500 years
type: TEMPORAL
value: for a practice
type: PURPOSE
Source sentences:
text: Leeches are used in medicine
text: Leeches were once used in medicine for a practice known as bloodletting.
text: Leeches have been used in medicine for over 2,500 years.