Assertion: concertina | /r/HasProperty | free-reed musical instrument
Facets:
value: with buttons
type: OTHER
value: with bellows on both ends
type: OTHER
Source sentences:
text: Similar to various accordions and harmonicas, the concertina is a free-reed musical instrument with buttons and bellows on both ends.
text: A concertina is a free-reed musical instrument, similar to an accordion.
text: Concertina, free-reed musical instrument patented by Sir Charles Wheatstone in London in 1829.