Question: What is the name of the designer of the locomotive used on the public rapid transit system serving London and some parts of the adjacent counties of Buckinghamshire, Essex and hertfordshire in the United Kingdom?
Sentence (from "Fowler's Ghost"): "Fowler's Ghost" is the nickname given to an experimental fireless 2-4-0 steam locomotive designed by John Fowler and built in 1861 for use on the Metropolitan Railway, London's first underground railway.
Relevant evidence: Yes