Assertion: plutonium | /r/HasProperty | discovered by arthur wahl
Facets:
value: in 1940
type: TEMPORAL
Source sentences:
text: Plutonium was discovered by Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy & Edwin McMillan in 1940.
text: Plutonium was discovered by Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl in 1940.