Illustration of the modeling and removal of the continuum. The continuum-subtracted emission-line spectrum is shown by the top curve. Below the emission-line spectrum, the modeled continuum is overplotted by the red curve on the observed spectrum. The modeled continuum is obtained by a linear combination of a starlight component, a power law continuum from the AGN, and the emission from the FeII complex, which are displayed in ordinals below the observed spectrum. All the spectra are shifted vertically by an arbitrary amount for visibility.