Assertion: oboe's key | /r/HasProperty | added
Facets:
value: during this time
type: TEMPORAL
Source sentences:
text: At this time it hardly had any keys, but gradually more keys were added which made it easier to play the sharps and flats.
text: More keys were added during this time and the bore of the wood was narrowed again.
text: At this time it hardly had any keys, but gradually more keys were added which made it easier to play the sharps and flats.
text: Keys were added as time progressed.
text: Sometime around 1700, a fourth key (G♯) was added, and it was for this type of instrument that composers such as Antonio Vivaldi, Bach, and Georg Philipp Telemann wrote their demanding music.
text: A fifth key, for the low E♭, was added during the first half of the 18th century.
text: There are lots of optional keys that can be added.