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'.

Q: Context: Construction was completed on Lake Shore Drive, with northbound lanes named for Leif Erikson, and southbound lanes for Christopher Columbus. Link Information: none Question: Of the explorers whose names are used for lanes on Lake Shore Drive, which one lived longer?

A: Answer: none
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Q: 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?

A: Answer: 519,445
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Q: Context: he took command of the 21-gun corvette HMS Racoon from commissioning in 1863 until 1866, during which time Queen Victoria's second son, Alfred, Duke of Edinburgh (1844–1900) served on board as a lieutenant. Link Information: romoted to lieutenant on 24 February 1863, serving under Count Gleichen on the corvette Question: How old was Alfred, Duke of Edinburgh when he served on the HMS Racoon as a lieutenant?

A:
Answer: 19
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