Assertion: bassoon | /r/HasAspect | 8 keys
Facets:
value: at that time
type: TEMPORAL
value: typically
type: DEGREE
Source sentences:
text: The bassoon at that time typically had 8 keys, but Almenräder increased the number of keys, making repeated innovations such as improving the part of the instrument where its tube bends back on itself, known as the "U-tube", making the pitch easier to control, and increasing the instrument's volume.