Abundance ratios of [S/Zn] as a function of [Zn/H] for DLAs (z > 1.5), as well as Sculptor and Milky Way stars. In the top panel, Sculptor stars are circles, colored according to their ages: the oldest stars are dark blue, and the youngest are light blue. Stars without age determination are represented by unfilled circles. The light blue circle in the bottom panel only includes three Sculptor stars. Otherwise, symbols are the same as in Fig. 2, where references are also listed.