Upper panels: dielectron \ptee-differential yields in two different \mee ranges, $0.18 \mee 0.34$~\GeVmass (left) and $1.2 \mee 2.6$~\GeVmass (right), in the 10\% most central Pb--Pb collisions at \fivenn, compared with the expected e$^{+}$e$^{-}$ contributions from known hadronic decays, including two different estimations for dielectrons from correlated heavy-flavor hadron decays (see text). Bottom panels: ratios data to cocktails, excluding the contribution from vacuum $\rho$, together with two predictions for thermal radiation from the medium~. The error bars and boxes represent the statistical and systematic uncertainties of the data, respectively, whereas the bands show the uncertainties of the hadronic cocktails.