Assertion: nitric oxide | /r/AtLocation | upper and lower airway
Facets:
value: at 100 to 1000 ppb
type: OTHER
value: naturally
type: MANNER
Source sentences:
text: Nitric oxide is a component of smog that can be measured in urban area air at 10 to 100 parts per billion (ppb), is naturally produced in the body in the upper and lower airway at 100 to 1000 ppb, and is present in cigarette smoke at 400 to 1000 parts per million (ppm).