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: According to Yoshiaki Yoshimi and Seiya Matsuno, Emperor Showa authorized, by specific orders (rinsanmei), the use of chemical weapons against the Chinese. Link Information: none Question: How long was the reign of the emperor who used chemical weapons against the Chinese according to Yoshiaki Yoshimi?
Answer: none