Assertion: strontium 90's life | /r/HasProperty | 2.88e1 years
Facets:
Source sentences:
text: The half-life of strontium-90 is 2.88e1 years.
text: The half-life of strontium-90 is 2.88e1 years.
text: The half-life of strontium-90 is 2.88e1 years.