Complex sentence: Some established groups like "Grupo Ictus" were tolerated while new formations like "Grupo Aleph" had its members jailed and forced to go into exile after performing a parody on the 1973 Chilean coup d'état.
Split into simpler sentences: Some established groups like "Grupo Ictus" were tolerated while new formations like "Grupo Aleph" were repressed. This last group had its members jailed and forced to go into exile after performing a parody on the 1973 Chilean coup d'état.