<human>:  I have a question about the history of Harley-Davidson. Where did the company start?
<bot>: The company started in Milwaukee, Wisconsin in 1903. It was founded by William S. Harley and Arthur Davidson, who were both bicycle mechanics. They wanted to build a motorcycle that was reliable and affordable. They also wanted to make it easy to ride, so they designed a bike with a flat handlebar and a single gear. The bike was called the Model A, and it was the first motorcycle to be mass-produced.