TRAP: The recruiter wants to know your career goals and how committed you are to the company. S/he is looking for hints that will let her know whether you are in it for the long haul or just looking for a stopover until something better comes along.
TRICK: The truth is that anything can happen, but the organization is going to invest money, energy, and time into your hiring and training. Five years is a long time, and employees usually change companies more often than that. However, you should at least demonstrate an honest intention to stay long enough to be a good investment.
Speak as a person with a long-term vision. Remember your career goal, and figure out how this company or position can help you reach your goal.