Assertion: piano's mechanism | /r/HasProperty | 21st century
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Source sentences:
text: Érard pedal grand piano and Pleyel upright pedal piano), or it may consist of two independent pianos (each with its separate mechanics and strings) which are placed one above the other, either a regular piano played by the hands and a bass-register piano played by the feet (e.g. the 18th century pedal piano owned by Wolfgang Amadeus Mozart and the 21st century Doppio Borgato made by Luigi Borgato), or two standard pianos of which the lower one is played from a pedalboard which acts on its (manual) keyboard through a special mechanism (e.g. the 21st century Pinchi Pedalpiano System).