[S III]λ9531 Å emission line (black solid line) and best-fit model (red solid line). The [S III]λ9531 Å line is modeled using the [O III] model, the 1N and 2N components are plotted together with the green dotted line, the I component is shown with the golden dot-dashed line, and the VB component with the blue dashed line. The residuals of the fit are normalized and plotted below the spectrum (black dot-dashed line). The vertical dashed lines mark the restframe wavelength of the fitted emission line.