Assertion: keyboard's key | /r/HasProperty | good for building up finger strength
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Source sentences:
text: For example, the weighted keys on the piano are good for building up finger strength which enhances your playing technique; and when you play a note or notes on a piano, the enharmonics (where the neighboring piano strings vibrate in harmony with the notes/s you have just played) give a richness to the sound that is unique to the piano.