Complex sentence: The present reconditioned vertical water-tube boiler was taken from a steam crane built in 1953 that had been converted to diesel and to reduce smoke nuisance was converted to burn light oil by McEwen Ltd. of Keighley in Yorkshire.
Split into simpler sentences: The present reconditioned vertical water-tube boiler was taken from a steam crane built in 1953 that had been converted to diesel. To reduce smoke nuisance was converted to burn light oil by McEwen Ltd. of Keighley in Yorkshire.