Complex sentence: They produced their first rail car in 1909, which they sold to the Yreka Railroad, and the newly named Hall-Scott Motor Car Company was launched, with manufacturing in Berkeley, California in 1910 and with headquarters for a short time in San Francisco.
Split into simpler sentences: They produced their first rail car in 1909, which they sold to the Yreka Railroad. In 1910, a factory was opened in Berkeley, California, with headquarters for a short time in San Francisco.