Complex sentence: The Swiss Social Archives were founded in 1906 by Paul Pflüger, a social reformer, politician and pastor from the working-class district of Aussersihl (Zurich).
Split into simpler sentences: The Swiss Social Archives were founded in 1906 by Paul Pflüger. He was a social reformer, a politician and a pastor from the working-class district of Aussersihl (Zurich).