In Ref. 44, we studied 18 small molecules (water, hydrogen sul de, ammonia, hydrogen chloride, dinitrogen, carbon monoxide, acetylene, ethylene, formaldehyde, methanimine, thioformaldehyde, acetaldehyde, cyclopropene, diazomethane, formamide, ketene, nitrosomethane, and the smallest streptocyanine) with sizes ranging from 1 to 3 non-hydrogen atoms. For such systems, using sCI expansions of several million determinants, we were able to compute more than hundred highly accurate vertical excitation energies with typically augmented triple-ζ basis sets. It allowed us to benchmark a series of 12 state-of-the-art excited-state wave function methods accounting for double and triple excitations.