Assertion: aid | /r/CapableOf | become common
Facets:
value: during the late 1950s through 1970s
type: TEMPORAL
Source sentences:
text: During the late 1950s through 1970s, before in-the-ear aids became common (and in an era when thick-rimmed eyeglasses were popular), people who wore both glasses and hearing aids frequently chose a type of hearing aid that was built into the temple pieces of the spectacles.