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: The opera received its first performance by the San Francisco Opera on 10 September 1994 Link Information: Conrad Stephen Susa (April 26, 1935 – November 21, 2013) Question: How old was Conrad Susa when The Dangerous Liaisons first premiered?
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: 59