response: Well there are hammers in the piano. When the keys are pressed, the hammers hit the strings.
original_response: A piano has 88 keys, which are essentially small levers which you press down on and cause the little hammers inside to strike the strings.
history: I'm learning how to play the piano. That's very interesting! Did you know it was actually invented in 1700? An inventor, Bartolomeo Cristofori, made it in Italy. No I haven't actually looked into the history at all. Can you describe the mechanisms of playing the piano though? I get the piano makes noises but not sure really how.
knowledge: It is played using a keyboard, which is a row of keys (small levers) that the performer presses down or strikes with the fingers and thumbs of both hands to cause the hammers to strike the strings.