Assertion: violin | /r/HasProperty | integral part of popular music
Facets:
value: during the 1920s
type: TEMPORAL
value: during early-1930s
type: TEMPORAL
value: for dance music.[citation
type: PURPOSE
Source sentences:
text: During the 1920s and early-1930s, violins were an integral part of popular music, especially for dance music.[citation needed]