Assertion: planet's atmosphere | /r/HasProperty | helium
Facets:
value: primarily
type: DEGREE
Source sentences:
text: Eighth planet from the Sun; its atmosphere, composed of hydrogen, helium and methane, gives Neptune its bluish color.
text: Exotic Gases Zro Gaseous planet with an atmosphere primarily composed of hydrogen and helium surrounding a dense core.
text: Gas Giant A gaseous planet with an atmosphere primarily composed of hydrogen and helium surrounding a dense core.