Complex sentence: As his former teacher at dffb, Farocki was a major influence on Petzold, who, along with Angela Schanelec and Thomas Arslan, is generally considered to be part of the Berlin School.
Split into simpler sentences: As his former teacher at dffb, Farocki was a major influence on Petzold (as well as for Angela Schanelec and Thomas Arslan). Petzold is generally considered to be part of the Berlin School.