Assertion: hydrogen's energy | /r/CreatedBy | nuclear fusion
Facets:
value: through a series of nuclear reactions
type: CAUSE
value: in the core region
type: LOCATION
Source sentences:
text: Through most of the Sun's life, energy has been produced by nuclear fusion in the core region through a series of nuclear reactions called the p–p (proton–proton) chain; this process converts hydrogen into helium.