WHAN diagnostic diagrams for the cross-matched (left column) and the SDSS samples (right column, both in orange) overplotted with AGNs selected from the [Oi]-based diagram. The upper-left plot shows the Seyferts (in red) among the radio emitters, while the upper-right plot shows the Seyferts in the parent SDSS sample. The lower panels show the LINERs distribution (in blue). Contours number density refers to the underlying orange distribution of each plot and is equal to 70 galaxies per contour in the left panels and to 700 galaxies per contour in the right panels.