user: Who does what in U2?

assistant: The rock band U2 features Bono on lead vocals and guitar, the Edge on lead guitar, keyboard and vocals, Adam Clayton on bass guitar and Larry Mullen Jr. on drums and percussion.

user: What's changed and unchanged for IKEA pencils through the years?

assistant: The color changed from blue, to yellow to the natural color of wood. The dimensions of the pencil has never changed which is always 7 x 87mm.

user: What are transistors made from?

assistant: silicon, germanium