Complex sentence: It has 19 stations, and goes through the cities of Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Hayward, Union City, and Fremont, and is the only BART line that does not go to San Francisco.
Split into simpler sentences: It has 19 stations, and goes through the cities of Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Hayward, Union City, and Fremont. It is the only BART line that does not go to San Francisco.