Assertion: piano's string | /r/HasProperty | due corde
Facets:
Source sentences:
text: When the una corda was activated, the entire action shifted to the right so that the hammers hit one string (una corda) instead of two strings (due corde).
text: On the pianos of the late eighteenth to early nineteenth centuries, the pianist could shift from the normal three-string (tre corde) position to one in which either two strings (due corde) or only one (una corda) would be struck, depending on how far the player depressed the pedal.