texts: topic: Piano  <s> I'm learning how to play the piano. </s> <s> That's wonderful. It is a beautiful instrument, invented in Italy in the 1700s by Bartolomeo Cristofori. </s> <s> How many keys does a piano have?
labels: 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.