There is no a priori answer to that question, and no limitations on the type of models! We are excited to see what kind of ideas you come up with, and will not put any restrictions on the type of data ahead of time. The best proposal will be chosen based on feasibility, scientific impact, and the potential to solve an important biological data pertaining to human health. The plan is to use the best data possible, whether it already exists or whether it needs to be generated.