UV diagnostic diagrams for our sample based on the EWs of CIII] (left) and CIV (right). In both panels, our sample is color-coded by EW([OIII]), and the dashed black lines are the demarcation between AGN (on the left) and SF (on the right) according to Nakajima et al. (2018). In the right panel, the symbols with magenta edges are galaxies classified as AGN according to the EW(CIII])–CIII]/HeII diagram.