Assertion: krypton | /r/HasProperty | discovered by morris travers
Facets:
value: in 1898
type: TEMPORAL
Source sentences:
text: Krypton was discovered by Sir William Ramsay and Morris Travers in 1898, as a residual gas in a chamber after all components of liquid air have been evaporated.
text: Krypton was discovered by Sir William Ramsay and Morris Travers