We are migrating from Quickscrum, can stories have other stories as parents?

We are migrating from Quickscrum, can stories have other stories as parents?

We have big stories and small stories part of the big stories. Importing our work items there is a parentid. I tried to put there the parent stories id. Still when looking for the small stories inside the big ones there is nothing. I suppose the parent id is only for tasks and bugs? Have you plan to allow to have stories as subitems from other stories?