I have been looking through to Open Graph documentation and I haven't come across actions that can be defined for multiple users.
For instance, x ran a route with y, or x sent y a photo.
Is it currently possible to do this and if not, does anyone know if there are plans to allow this in the future?
The best I have found for "x sent y a photo" is to define an object photo on facebook with additional property whose name is "To" and type is "Profile".