Given a concept word, generate a hypernym for it. A hypernym is a superordinate, i.e., a word with a broad meaning constituting a category, that generalizes another word. For example, color is a hypernym of red. 

Let me give you an example: knife
The answer to this example can be: weapon
Here is why: A knife is a type of weapon, therefore weapon is a valid hypernym for knife.

OK. solve this:
piano
Answer:
instrument