Complex sentence: Burgsmüller retired at almost 41, also having appeared three times for West Germany, in friendlies comprised in a three-month span; his debut came on 16 November 1977, in a 4--1 win with Switzerland.
Split into simpler sentences: Burgsmüller retired at almost 41, also having appeared three times for West Germany, in friendlies comprised in a three-month span. His debut came on 16 November 1977, in a 4--1 win with Switzerland.