Assertion: singer's style | /r/CapableOf | develop through early commercial recordings
Facets:
value: in the early 20th century
type: TEMPORAL
Source sentences:
text: As the style developed through early commercial recordings and performances in the early 20th century, the role of the lead vocalist became more established, although popular groups of the 1930s and 1940s such as the Ink Spots and the Mills Brothers generally used different lead singers on different songs rather than keeping the same lead singer throughout.