Assertion: leech's host | /r/CapableOf | secrete enzyme
Facets:
value: to prevent the blood clotting
type: PURPOSE
value: into the blood stream
type: TRANSITIVE-OBJECT
Source sentences:
text: When feeding on blood the leeches attach to the host, release an anesthetic (so the host cannot feel them) and secrete an enzyme (hirudin) into the blood stream to prevent the blood clotting.