Assertion: violin's horn | /r/CapableOf | become standard
Facets:
value: since
type: TEMPORAL
Source sentences:
text: The Ninth asks for a second pair of horns, for reasons similar to the "Eroica" (four horns has since become standard); Beethoven's use of piccolo, contrabassoon, trombones, and untuned percussion—plus chorus and vocal soloists—in his finale, are his earliest suggestion that the timbral boundaries of symphony might be expanded.