Cluster median [s-proc/Fe] as a function of log(ϵ(s-proc_⊙)), where log(ϵ(s-proc_⊙)) is the G07 solar abundance. The s-process element names and the median of the s-process abundance standard deviations of five GES IOCs are indicated in the bottom of the panel. The median abundances and standard deviations of the inner disk field (IDF) giants are labeled as green squares with error bars. The symbols of the five GES IOCs and M 67 are indicated in the top left. The dotted line represents [s-proc/Fe] = 0.