Assertion: actinium's supply | /r/CapableOf | amount to about 5 pounds
Facets:
value: in 1954
type: TEMPORAL
Source sentences:
text: In 1954, the total worldwide supply of purified radium amounted to about 5 pounds (2.3 kg) and it is still in this range today, while the annual production of pure radium compounds is only about 100 g in total today.