Assertion: decay's life | /r/HasProperty | 4.7 × 1010 y.
Facets:
Source sentences:
text: (The half-life of the β decay of Rb-87 is 4.7 × 1010 y.)
text: (The half-life of the β decay of Rb-87 is 4.7 × 1010 y.)
text: (The half-life of the β decay of Rb-87 is 4.7 × 1010 y.)