Complex sentence: Seelenbinder was born in Stettin (Szczecin), Pomerania, and became a wrestler after training as a joiner, and had connections to the young people's workers' movement from an early age.
Split into simpler sentences: Seelenbinder was born in Stettin (Szczecin), Pomerania, and became a wrestler after training as a joiner. He had connections with the young people's workers' movement from an early age.