Assertion: diver's breathing gas | /r/ObjectUse | used for diving
Facets:
value: after replacing oxygen
type: TEMPORAL
Source sentences:
text: Nitrogen (N 2 ) is a diatomic gas and the main component of air, the cheapest and most common breathing gas used for diving.
text: Rebreather diving is underwater diving using rebreathers, which recirculate the breathing gas already used by the diver after replacing oxygen used by the diver and removing the carbon dioxide metabolic product.