In order to maintain a consistent labeling, the excited state to be compared to the QUESTDB excitation energy was chosen to be the state highest in energy as judged by tPBE. Although this is not a fail-proof scheme in terms of isolating the "same" QUESTDB state of the specified symmetry due to root flipping, we have found it to be satisfactory for our work as the converged QUESTDB wave functions are unavailable and labels such as "n → π * " are ambiguous non-observables. However, because the present work shows that tPBE0 is more accurate than tPBE, we suggest ordering the states by tPBE0 in future work.