\begin{equation}
    R^\eta_\mathcal{L}(f) = \mathbb{E}_{(I_i,\tilde{y}_{i\cdot})\sim\mathcal{D}_\eta}\left[ \mathcal{L}(f(I_i,T_\cdot),\tilde{y}_{i\cdot}) \right] + \mathbb{E}_{(T_i,\tilde{y}_{\cdot i})\sim\mathcal{D}_\eta}\left[ \mathcal{L}(f(T_i,I_\cdot),\tilde{y}_{\cdot i}) \right],
\end{equation}
