Assertion: guinea pig's total | /r/CapableOf | decrease to about 375,000
Facets:
value: by the mid-1990s
type: TEMPORAL
Source sentences:
text: Guinea pigs remained popular laboratory animals until the later 20th century: about 2.5 million guinea pigs were used annually in the U.S. for research in the 1960s, but that total decreased to about 375,000 by the mid-1990s.