user: Identify which instrument is string or percussion: Sikulu, Sharki

assistant: Sharki is string, Sikulu is percussion.

user: Extract from this text a list of the major films, books, and art pieces of Bruce Petty's career.

assistant: * Leisure, a 1976 animated fillm
* Art, an animated film
* Australian History, an animated film
* Hearts and Minds, an animated film
* Karl Marx, an animated film
* Man Environment Machine, a machine sculpture featured at World Expo '85
* Global Haywire, a 2007 documentary
* Petty's Parallel Worlds, a 2008 book

user: How many keys does a full piano have?

assistant: 88; 52 keys are white and 36 are black.