EWs of Hβ and upper limit on [O III] λ5007 for J0313-1806 (green triangle). We compare it to a sample of WLQs identified by Chen et al. (2024) (orange circles for detected [O III] λ5007, orange triangles for upper limits). We also show Gaussian kernel density contours for SDSS DR16Q quasars (Wu & Shen 2022). This highlights the particular weakness of the [O III] λλ4959,5007 emission in the nuclear spectrum of J0313–1806, even relative to typical WLQs.