Assertion: piano's action | /r/CapableOf | shift in the earliest pianos
Facets:
Source sentences:
text: In the earliest pianos whose unisons were bichords rather than trichords, the action shifted so that hammers hit a single string, hence the name una corda, or 'one string'.
text: In the earliest pianos whose unisons were bichords rather than trichords, the action shifted so that hammers hit a single string, hence the name una corda, or 'one string'.