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: On 21 January 1779, Cooke was promoted to lieutenant and joined in the East Indies under Sir Edward Hughes Link Information: On 21 January 1779, Cooke was promoted to lieutenant and joined in the East Indies under Sir Edward Hughes Question: How old was Sir Edward Hughes when Cooke was promoted to Lieutenant?
A:

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: 58