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'.

Ex Input:
Context: After attending Kent School, he enrolled at Princeton University, from which he graduated in 1961 with a B.A. in sociology. He went on to receive a doctorate in sociology from American University in 1983 Link Information: none Question: Which is the biggest school that Taube attendend?

Ex Output:
Answer: none


Ex Input:
Context: The foreword of the book was written by Grafton Elliot Smith. Link Information: none Question: How long did Grafton Elliot Smith know Donald Alexander Mackenzie at the time he wrote the foreword of Ancient Man in Britain?

Ex Output:
Answer: none


Ex Input:
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?

Ex Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Answer: 19


