[NeV]-over-[OII] emission line ratios as a function of [NeV] luminosity for [NeV] emitters in the green valley (top) and blue cloud (bottom). Solid symbols are [OII] detected sources. Open symbols and arrows represent 3σ upper limits for [OII] non-detections. The typical error bars associated with these quantities are plotted in the bottom right corner of the two panels. The horizontal lines show the separation of each class into three equally populated regions. The combined spectra of galaxies with extreme ratios (HR and LR) are plotted in Fig. 9.