Assertion: electric guitar | /r/CapableOf | peak in the 60s and
Facets:
value: during the 20th century
type: TEMPORAL
Source sentences:
text: With advancing technology, more sophisticated musical instruments became possible, and during the 20th century, peaking in the ‘60s and ‘70s, the electric guitar became an institution for musicians and a battlefield of competition among the great guitar players of the era.