Assertion: star | /r/MadeOf | helium
Facets:
value: mostly
type: DEGREE
value: in her 1925 phd thesis
type: TEMPORAL
Source sentences:
text: Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.
text: Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.
text: Cecilia Payne-Gaposchkin first proposed that stars were made primarily of hydrogen and helium in her 1925 PhD thesis.