H_β, [OIII], and H_α regions of the optical spectrum of IRASF11119. The observed spectrum is plotted in gray, while the best fit is shown as the black dashed line. Different model components are traced by lines of different colors, as indicated by the label. The vertical dashed lines indicate the rest-frame wavelength for each labeled emission line, for z = 0.187. In the bottom panels, residuals are plotted. Note that the H_α shows significant residuals, possibly due to the blending with the [NII] doublet, but this effect is negligible for our goals.