Assertion: leech | /r/HasProperty | predominant medical device
Facets:
value: in 19th-century europe
type: TEMPORAL
value: for bloodletting
type: PURPOSE
value: in ancient greece
type: LOCATION
Source sentences:
text: In ancient Greece and 19th-century Europe, leeches were the predominant medical device for bloodletting, a procedure by which practitioners sought to help balance the body's "humors" (phlegm, blood and bile) by simply allowing the subject to bleed for a bit.