Complex sentence: Still, this did not deter him from conspiring against the state, in 1845 he joined Teofil Wiśniowski and his Towarzystwo Demokratyczne Polskie.
Split into simpler sentences: Still, this did not deter him from conspiring against the state. In 1845 he joined Teofil Wiśniowski and his Towarzystwo Demokratyczne Polskie.