Invariant mass distributions for ${\rm K^0_S}$ (a), $\Lambda$ (b), and $\Xi^{-}$ (c) in different \pt intervals for the inclusive $\rm{INEL}>0$ class. The candidates are reconstructed in the rapidity interval $|y| < 0.5$. The red and grey areas delimited by the short-dashed lines are used for signal extraction in the bin counting procedure. The red dashed lines represent the fit to the invariant mass distributions used to define signal and background regions.