Complex sentence: Between July 1972 and December 1973, the Initiative Group issued only two documents, but in 1974, it produced a steady stream of protests focusing on the plight of inmates of the Gulag and psychiatric hospitals.
Split into simpler sentences: Between July 1972 and December 1973, the Initiative Group issued only two documents. It resumed its activity in 1974 with a steady stream of protests focusing on the plight of inmates of the Gulag and psychiatric hospitals.