Complex sentence: One of the commandants (since 1949), was a Polish Jew Solomon Morel, who previously gained a reputation for cruelty in the Zgoda labour camp in Świętochłowice; the others included Stanisław Kwiatkowski, Ivan Mordasov and Teofil Hazelmajer.
Split into simpler sentences: One of the commandants (since 1949), was a Polish Jew Solomon Morel, who previously gained a reputation for cruelty in the camp in Świętochłowice. Others included Stanisław Kwiatkowski, Ivan Mordasov and Teofil Hazelmajer.