Complex sentence: As the neighbour dialled 999, Sabina fled the premises and was caught on nearby CCTV.Sabina ran out of the house with a hammer, periodically hitting herself over the head with it.
Split into simpler sentences: As the neighbour dialled 999, Sabina fled the premises and was caught on nearby CCTV. She ran out of the house with a hammer, periodically hitting herself over the head with it.