Original sentence: He chaired the public inquiry into the Tay Bridge disaster, when an express train was lost by the collapse of the 2 mile long bridge across the Tay estuary on the night of December 28th, 1879
Edited sentence: He chaired the public inquiry into the Tay Bridge disaster, when an express train was lost by the collapse of the 2 mile long bridge across the Tay estuary on the night of December 28, 1879