Left panel: fit of the dielectron yield with the three-component function defined by Eq.~\ref{equationdir} in the 10\% most central \PbPb collisions at \fivenn as a function of \mee in the \ptee range $1 \ptee 2$~\GeVc. Right panel: ratio of direct to inclusive photon yields extracted from the dielectron spectra as a function of \pt in central \PbPb collisions at \fivenn. Statistical and systematic uncertainties on the data are shown separately as vertical bars and boxes, respectively.