Assertion: gamma ray | /r/HasProperty | alpha
Facets:
value: in the last instance
type: TEMPORAL
value: with mass
type: OTHER
Source sentences:
text: Gamma rays were first thought to be particles with mass, like alpha and beta rays.
text: This radioactivity comes in the three basic flavors introduced in the first sentence of this article: Alpha, beta and gamma radiation, also called alpha, beta and gamma particles (except, technically, in the last instance).