Assertion: strontium 90's life | /r/HasProperty | 38 days
Facets:
Source sentences:
text: The half-life of a certain radioactive material is 38 days.
text: The half-life of a certain radioactive material is 38 days.
text: The half-life of a certain radioactive material is 38 days.
text: The half-life of a certain radioactive material is 38 days.