Assertion: census's population | /r/CapableOf | reach four billion
Facets:
value: according seven billion in march
type: TEMPORAL
value: in 1974
type: TEMPORAL
value: thereafter
type: TEMPORAL
Source sentences:
text: Thereafter, the global population reached four billion in 1974, five billion in 1987, six billion in 1999 and, according to the United States Census Bureau, seven billion in March 2012.