Complex sentence: The issue reported on a major trial of the Social Christian Union in Leningrad and already carried information from the camps, but its main focus was on the trial of Galanskov and Ginzburg in Moscow.
Split into simpler sentences: The issue reported on a major trial of the Social Christian Union in Leningrad and carried information from the camps. Its main focus, however, was on the trial of Galanskov and Ginzburg in Moscow.