In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
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Question: Context: Columbia, formerly Wright's Ferry, is a borough (town) in Lancaster County, Pennsylvania, Link Information: As of the 2010 census, the population was 519,445. Question: What is the current population of the county where Columbia, PA is located?

Answer: Answer: 519,445


Question: Context: He was educated privately and at Tollington School. Link Information: Tollington School (1901-1967) was a selective, coeducational grammar school in Muswell Hill, London, England. Question: What town did W. J. MacQueen-Pope attend private school in?

Answer: Answer: London, England


Question: Context: The Dhoom series began with the release of Dhoom in 2004. Link Information: Dhoom (2004).A mysterious gang of bikers are on a robbing spree. ACP Jai gets Ali, a mechanic, to assist him in the case. With the clock ticking, it's up to them to nab the thieves red handed.

Dhoom 2 (2006).Jai and Ali return, this time on the trail of an international thief who steals priceless artifacts and has chosen Mumbai as his next target.

Dhoom 3 (2013).When Sahir, a circus entertainer trained in magic and acrobatics, turns into a thief to take down a corrupt bank in Chicago that ruined his father, Indian officers Jai and Ali are called to catch him. Question: how many other films in the Dhoom series came out after Dhoom's initial release?

Answer:
Answer: 2