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: he publication of Black Ranching Frontiers: African Cattle Herders of the Atlantic World, 15001900 (Yale University Press, 2012) Link Information: none Question: Has the university press that published Sluyter's book in 2012 existed longer than the university press that published his book in 2015?
Answer: none