Spectrum of a LINER with a clear BLR (NGC 4203) reproduced with a skewed Gaussian (red curve). The residual [N II]+Hα complex is modeled with 3 different methods: by cloning the [S II] doublet (left), by including a second broad Hα component (middle), or by using the [O I] doublet (right). The original spectrum is in black, the individual lines are in blue, the total line emission in green, the residuals in red. Wavelengths are in Å, while fluxes are in units of 10^-18erg s^-1 cm^-2 Å^-1.