Complex sentence: The MV "Royal Iris" was a twin screw, diesel-electric Mersey Ferry built by William Denny & Brothers of Dumbarton, Yard No.1448, launched in December 1950, costing £256,000.
Split into simpler sentences: The MV "Royal Iris" is a twin screw, diesel-electric, former Mersey Ferry. The vessel was built by William Denny & Brothers of Dumbarton (Yard No.1448) and launched in December 1950, costing £256,000.