Assertion: group's number | /r/CapableOf | remain constant
Facets:
value: almost
type: DEGREE
value: in the early 1960s
type: TEMPORAL
Source sentences:
text: Although the number of ADC interceptor squadrons remained almost constant in the early 1960s, attrition (and the fact that production lines closed in 1961) caused a gradual drop in the number of planes assigned to fighter interceptor squadrons, from 24 to typically 18 by 1964 and to 12 by 1967.