Complex sentence: Smokey Joe is based on an ex-Caledonian Railway Class 0F or Class 264 engine, both shunting locomotives designed by William Drummond and in service from 1885 to 1962.
Split into simpler sentences: Smokey Joe is based on an ex-Caledonian Railway Class 0F (sometimes erroneously said to be the virtually identical Class 264 engine). These were shunting locomotives designed by William Drummond and in service from 1885 to 1962.