Example of a low-resolution JWST/MIRI spectra of a SB-AGN galaxy at z = 2.88. At the top the rest-frame wavelengths are shown; on the bottom the observed wavelengths are shown. The original spectrum (solid black line), the spectrum after the addition of nebular lines (dashed red line), and the spectrum after the application of the spectral resolution and noise (dotted green line) are shown. On the top, short vertical dotted lines indicate the wavelength position of the nebular emission lines included despite their S/N.