My team decided to open source an Unreal Engine 4 project. We know that the Engine source code cannot be open source, so we only committed our assets we made ourselves. One thing that stands out is the Starter Contents, which was generated by Unreal Engine 4 through default settings when creating a new project.
I was wondering if the Starter Contents can be Apache Licensed. If not, does that mean the Starter Contents are not supposed to be licensed through approved licenses, such as MIT, BSD, etc.?