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: In 1230 Irene and her family were captured by the troops of tsar Ivan Asen II of Bulgaria Link Information: Ivan Asen II, also known as John Asen II or John Asan II (, ; 1190s May/June 1241) Question: At what age was Ivan Asen II of Bulgaria when his troops captured Irene and her family?
A:
Answer: 40