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: art dealer Link Information: Siegfried Bing played a key role in publicizing the style. I Question: When was the art dealer who played a key role in bringing attention to Art Nouveau born?
Answer: 26 February 1838