﹩{(u-g)}_{0},{(g-r)}_{0}﹩ CC diagram showing the density of sources in the training set. The location of EMP stars in the training set is highlighted. Notice that the EMP stars form a relatively tight cluster that is parallel to the main stellar locus. EMP stars that are recovered by the synthetic-oversampling method are shown in yellow, while non-detections are shown in magenta. The synthetic-oversampling method is biased toward discovering those stars on the extremes of the sample distribution (see also Section 5.3).