Assertion: lung's blood vessel | /r/CapableOf | deliver blood
Facets:
value: into close contact with the surface
type: OTHER
value: for the exchange of oxygen
type: PURPOSE
Source sentences:
text: The alveoli are surrounded by blood vessels that deliver blood for the exchange of oxygen.
text: The book lungs contain blood vessels that bring the blood into close contact with the surface exposed to the air and where gas exchange between blood and air occurs.