Question: When was the clock tower in london built?
Disambiguated questions and answers: question: When was the clock tower in london, Ontario built?
When was the clock tower in Surbiton, london built?
When was the clock tower in Palace of Westminster, london built?
When was the clock tower in King's Cross station, london built?
When was the Little Ben clock tower in london built?
When was the clock tower in St. Pancras railway station, london built?
answer: 1846
1902
31 May 1859
1851
1892
1868
Natural Questions answer: 1859 (from the Wikipedia article "Big Ben")