Assertion: astatine | /r/HasProperty | discovered in berkeley
Facets:
value: by dale r. corson
type: OTHER
value: by k. r. mackenzie
type: OTHER
value: by emilio segre in 1940
type: TEMPORAL
Source sentences:
text: Astatine was discovered in University of California, Berkeley, USA by Dale R. Corson, K. R. MacKenzie, and Emilio Segre in 1940.