Complex sentence: Two years into construction of the bridge, tragedy struck at 11.50 am on 15 October 1970, the 112 metre (367.5 ft) span between piers 10 and 11 collapsed and fell 50 metres (164 ft) to the ground and water below.
Split into simpler sentences: Two years into construction of the bridge, at 11.50 am on 15 October 1970, tragedy struck. The 112 metre (367.5 ft) span between piers 10 and 11 collapsed and fell 50 metres (164 ft) to the ground and water below.