Complex sentence: At the same time the Iranian goverment made all parties (except Islamic Republic Party party) illegal and government forces arrested and imprisoned the members of other parties such as People's Mujahedin, Fadaian Khalgh, Toodeh, and Paikar.
Split into simpler sentences: At the same time the Iranian goverment made all political parties (except the Islamic Republic Party) illegal. Government forces arrested and imprisoned the members of other parties such as People's Mujahedin, Fadaian Khalgh, Toodeh, and Paikar.