Q: 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: After brief post-doc positions at SLAC and Caltech Link Information: none Question: Of the first two post-doc positions John Ellis held, which company did he work for the longest?
A:
Answer: none