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: the Washington Volunteers had started for Yakima via Natchez Pass when they were overtaken on 29 October 1855 by the Nisqually tribe Link Information:

Isaac Stevens, first governor of Washington Territory, appointed Leschi as chief in 1854 to represent the Nisqually and Puyallup tribes Question: How long had Chief Leschi been a leader for the year the Washington Volunteers were overtaken by the Nisqually tribe?
A:
Answer: 1