Complex sentence: Werner Voss was shot down while flying the F.I sn 13/17, which is usually misidentified as a Dr.I. Manfred von Richtofen flew F.I 103/17 in September 1917 scoring his 60th victory in the plane on the 7th of that month.
Split into simpler sentences: Werner Voss was shot down while flying the F.1 sn 13/17, which is usually misidentified as a Dr.1. Von Richtofen flew F.1 103/17 in September 1917 scoring his 60th victory in the plane on the 7th of that month.