Detailed Instructions: 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: by a Royal Charter from the King of England, Charles II, who had in turn acquired it on May 11, 1661, when his marriage treaty with Catherine of Braganza Link Information: Royal Charter of 27 March 1668 Question: How much time had passed between King Charles' wedding treaty with Catherine of Braganza and the Royal Charter?
A:
Answer: 7