system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
How did Andy Warhol create the "piss paintings"?


assistant
Andy Warhol invited staffers who worked with him to help him paint by urinating on canvases that were covered by Warhol in copper paint. The urine reacted with the copper paint chemically to create different colours. The urine also created physical impacts on the copper paint on the canvas.