Exemplary SEDs of star-forming galaxies (top), WISE/BPT-AGN (middle), and SED-AGN-only (bottom). The different curves represent the contributions from various components: stellar emission (attenuated and unattenuated), nebular emission, dust emission, and AGN emission. The black curve is the total model spectrum, and the observed fluxes are overlaid as violet points. The SED of an SED-AGN-only galaxy is characterized by a dominant AGN contribution in the MIR and a relatively weak stellar component, suggesting a passive galaxy.