Complex sentence: Accepting the plaque on behalf of the victims was Hamilton's oldest surviving retired coal miner, 96 years old Jimmy Glen who, in 1917 at the age of 13 years, started work at the screening tables in the Bent Colliery.
Split into simpler sentences: Accepting the plaque on behalf of the victims was Hamilton's oldest surviving retired coal miner, 96 years old Jimmy Glen. In 1917 at the age of 13 years, Jimmy started work at the screening tables in the Bent Colliery.