ANN components ν_S1.8 versus ν_S1 (top row), ν_SB versus ν_S1.8 (middle row), and ν_SB versus ν_S1 (bottom row). Each row is split into three panels for the S1, S1.8, S2, and L1.8 classes (left), L2 and T2 classes (middle) and SB class (right). The dashed line shows the expected locus if the component not involved in the plot is negligible. Each plot shows objects that are closer to its dashed line than to the dashed line of the other two plots. The optical classes are shown as S1 (upside down red triangles), S1.8 (orange triangles), S2 (yellow diamonds), L1.8 (purple stars), L2 (light-blue pentagons), T2 (dark-blue squares), SB-AGN (green circles), and SB (green circles with small black dots). Black dots indicate objects that might not be AGN according to the literature (see Table 1).