Assertion: astatine | /r/ObjectUse | used as radioactive tracer
Facets:
value: very occasionally
type: DEGREE
value: sometimes
type: TEMPORAL
value: in cancer treatment
type: TEMPORAL
Source sentences:
text: Astatine is sometimes used as a radioactive tracer and in cancer treatment.
text: Astatine can be very occasionally used as a radioactive tracer while treating cancer.