Assertion: carbon | /r/HasProperty | about 5,730 years
Facets:
Source sentences:
text: C (the period of time after which half of a given sample will have decayed) is about 5,730 years, the oldest dates that can be reliably measured by this process date to around over 50,000 years ago, although special preparation methods occasionally permit accurate analysis of older samples.
text: C to decay) is about 5,730 years, so its concentration in the atmosphere might be expected to decrease over thousands of years, but 14