Assertion: gas's carbon dioxide | /r/HasProperty | hydrogen
Facets:
Source sentences:
text: Gas is made up of several different vapors — carbon dioxide, hydrogen, methane, nitrogen, and oxygen — that pass through the body.
text: The timeline of attributed discovery for various gases are carbon dioxide (1754), hydrogen (1766), nitrogen (1772), nitrous oxide (1772)  , oxygen (1773)  , ammonia (1774), chlorine (1774), methane (1776), hydrogen sulfide (1777), carbon monoxide (1800), hydrogen chloride (1810), acetylene (1836), helium (1868)  fluorine (1886), argon (1894), krypton, neon and xenon (1898)  and radon (1899).
text: Carbon dioxide, hydrogen, nitrous oxide, oxygen, ammonia, chlorine, sulfur dioxide and manufactured fuel gas were already being used during the 19th century, and mainly had uses in food, refrigeration, medicine, and for fuel and gas lighting.