Assertion: md | /r/HasProperty | synthesized by gregory robert choppin
Facets:
value: at the university of california
type: LOCATION
value: in early 1955
type: TEMPORAL
Source sentences:
text: It was first synthesized by Albert Ghiorso, Glenn T. Seaborg, Gregory Robert Choppin, Bernard G. Harvey, and team leader Stanley G. Thompson in early 1955 at the University of California, Berkeley.