9. The method of claim 5 , wherein the moving comprises: moving, based on the adjusted mapping function, at least one of the first, second, or third items in the joint embedding space such that a distance in the trained joint embedding space between the first and second items is less than a distance between the first and third items.
5. The method of claim 1 , further comprising: moving at least one of the first or third items in the joint embedding space such that a distance in the trained joint embedding space.