Assertion: carbon's amount | /r/Causes | an error of 4,000 years
Facets:
value: for a sample
type: TRANSITIVE-OBJECT
Source sentences:
text: If a sample that is 17,000 years old is contaminated so that 1% of the sample is modern carbon, it will appear to be 600 years younger; for a sample that is 34,000 years old, the same amount of contamination would cause an error of 4,000 years.