Assertion: toy piano | /r/HasProperty | introduced in 19th century
Facets:
Source sentences:
text: The toy piano, introduced in the 19th century, is a small piano-like instrument, that generally uses round metal rods to produce sound, rather than strings.
text: The toy piano, introduced in the 19th century, is a small piano-like instrument, that generally uses round metal rods to produce sound, rather than strings.