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: Kristensen equalled Jacky Ickx's all-time record of six overall victories and was the first driver to win the 24 hour race five times in a row. Link Information: none Question: Which driver was younger when they achieved six overall victories in this circuit? 
A: 
Answer: none