Where do you expect your career to be in 10 years? 
(Be careful here.  You do not want to give the impression that you're simply using this company as a stepping stone to another career.  Think of a related managerial position within the company that would interest you.) There is a story about a young accountant who was asked this question by a CPA firm during an interview.   The young accountant replied that he saw himself as the comptroller of a large corporation.  In other words, "I'm just using your firm to teach me and then after you spend your resources training me, I will leave to go work for someone else."   Needless to say, he was not offered a position with the CPA firm.  They know that 75% of the people they hire will leave within 10 years, but they do not want to hire someone who comes in with that plan.