Assertion: ocean's amount | /r/CapableOf | give 80 × 10 6 years
Facets:
value: the residence time of na
type: TEMPORAL
Source sentences:
text: The whole ocean contains 6.4 × 10 20 moles (2.8 × 10 13 tons) of Na, and the total amount of Na present divided by the rate of addition gives 80 × 10 6 years, the residence time of Na.