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: In the early 1940s, he met Pearl Primus at the National Youth Administration and became her first dance partner before studying dance with Syvilla Fort and Katherine Dunham Link Information: Pearl Eileen Primus (November 29, 1919 October 29, 1994) Question: Which of his pre-World War Two dance partners was the oldest?
Answer: Katherine Dunham