user: Where were the sunspots first observed?

assistant: Galileo Galilei, Father of observational astronomy

user: Why donuts have holes?

assistant: Donuts have holes to help cook/bake the entire food item evenly

user: Which fictional LAPD detective is Titus Welliver known for playing?

assistant: Titus Welliver played Harry Bosch in the TV series Bosch and also in spin off Bosch:Legacy.