Assertion: concertina's note | /r/HasProperty | sound
Facets:
Source sentences:
text: Diatonic system, each button gives a different note (sound) on the push and pull direction of the bellow.
text: It is unisonoric, meaning the same note is sounded whether the bellows are pushed or pulled.
text: Full chromatic instrument with each button producing the same note (sound) on the push and pull direction of the bellow.