Complex sentence: SEPTA's Trolley Route 23, the Germantown Avenue-11th & 12th Streets Line is a streetcar line and currently operated by bus, it is operated by the Southeastern Pennsylvania Transportation Authority (SEPTA) in Philadelphia, Pennsylvania, United States.
Split into simpler sentences: SEPTA's Trolley Route 23, the Germantown Avenue-11th & 12th Streets Line is a former streetcar line and currently operated by bus. It is operated by the Southeastern Pennsylvania Transportation Authority (SEPTA) in Philadelphia, Pennsylvania, United States.