Complex sentence: Work started in May 1960 to demolish the Hall but on June 6th the same year a fire broke out which tore through the building, not even ten Teesside fire units could stop the fire due to the lack of water supply in the area.
Split into simpler sentences: Work started in May 1960 to demolish the Hall, but on June 6th the same year a fire broke out which tore through the building. Not even ten fire appliances could stop the fire due to the lack of water supply in the area.