Assertion: neon | /r/CapableOf | play role
Facets:
value: in 1913
type: TEMPORAL
Source sentences:
text: Neon played a role in the basic understanding of the nature of atoms in 1913, when J. J. Thomson, as part of his exploration into the composition of canal rays, channeled streams of neon ions through a magnetic and an electric field and measured the deflection of the streams with a photographic plate.