Given the task definition and input, reply with output. 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'.

Context: He then undertook post-graduate research at the Courtauld Institute of Art and completed his Doctor of Philosophy (PhD) degree. Link Information: none Question: What city did Brown do his post-graduate research in?
Answer: none