Question: When was the clock tower in london built?
qaPairs: question: When was the clock tower in london, Ontario built?
answer: 1846
question: When was the clock tower in Surbiton, london built?
answer: 1902
question: When was the clock tower in Palace of Westminster, london built?
answer: 31 May 1859
question: When was the clock tower in King's Cross station, london built?
answer: 1851
question: When was the Little Ben clock tower in london built?
answer: 1892
question: When was the clock tower in St. Pancras railway station, london built?
answer: 1868