Complex sentence: In the United Kingdom, the "Daily Mirror" newspaper printed pictures of Arsenal fans alleged to have been part of the violence; it later arose that the majority of the people in the photos were either not involved or had been acting in self-defence.
Split into simpler sentences: In the United Kingdom, the "Daily Mirror" newspaper printed pictures of Arsenal fans alleged to have been part of the violence. It later arose that the majority of the people in the photos were either not involved or had been acting in self-defence.