Assertion: bee's number | /r/CapableOf | decline over past 60 years
Facets:
value: steadily
type: MANNER
value: from 6 million colonies
type: OTHER
Source sentences:
text: The number of managed honey bee colonies in the United States has declined steadily over the past 60 years, from 6 million colonies (beehives) in 1947 to 4 million in 1970, 3 million in 1990, and just 2.5 million today.