Assertion: piano | /r/HasAspect | 88 keys
Facets:
Source sentences:
text: Harpsichords often extended over five octaves (61+ keys) in the 18th century, while most pianos manufactured since about 1870 have 88 keys.
text: This piano has a full 88 keys, which will help you hit all of the notes that you can on a traditional piano.