I think you might need to be more specific - the best answers to that question aren't really transferable between schools. Look at their website... see if you can get an idea for a program or two they offer that you'd want to try out, mention them. See if you can determine what they are proud of... a new research facility, etc. bring it up, and maybe even tie it into your experience. ("I'm particularly interested in your new research building, as I've done two years of work in blah blah blah research and I'm hoping to continue expanding my research experience during my time in dental school.") This question is there to see if you are really interested in their school or not... it can never hurt to go the extra mile on this one.
Good luck!