Performances of the two classifiers. Left: ROC curves based on the test sets for Classifier-1 (blue) and Classifier-2 (red). The x-axis is scaled such that 0−l0⁻⁴ is in a linear scale and 10⁻⁴−1 is in a logarithmic scale. The two star symbols correspond to FPR = 10⁻³. Right: TPR at an FPR of 10⁻³ as a function of lens galaxy redshift for Classifier-1 (blue) and Classifier-2 (red). The dashed lines indicate the overall TPRs of 0.85 and 0.60 for Classifier-1 and Classifier-2, respectively. Due to the small sample size, the last redshift bin is chosen to be 0.8–1.1. A histogram of the lens galaxy redshifts of the 92 SuGOHI strong-lens candidates in the test set is also shown (black).