Assertion: beryllium | /r/AtLocation | association
Facets:
value: with niobium
type: OTHER
value: with tungsten
type: OTHER
value: with tantalum
type: OTHER
Source sentences:
text: Beryllium was found in clouds of minute particles in sapphires from Ampasimamitaka, Madagascar, in association with niobium, tantalum, and tungsten (figure 1).