Assertion: oxygen | /r/HasProperty | plentiful
Facets:
value: at the onset of oxygen burning
type: TEMPORAL
Source sentences:
text: At the onset of oxygen burning, oxygen in the stellar core is plentiful due to the helium-burning process (4He(2α,γ)12C(α,γ)16O), carbon-burning process (12C(12C,α)20Ne, 12C(α,γ)16O), and neon-burning process (20Ne(γ,α)16O).