Complex sentence: Most of them shouted "Kossuth square" and "Let's go, let's go," and after the celebration a grave headcount started off, but in Alkotmány street they clashed with police forces, which made them retreat to the Cathedral.
Split into simpler sentences: Most of them shouted "Kossuth Square" and "Let's go, let's go," and after the celebration started off. On Alkotmány Street they clashed with police forces, which made them retreat to the Cathedral.