Normalized optical depth profiles of the silicate features for LEDA 1712304 (red) and the other AGNs (gray; Stierwalt et al. 2013; Imanishi et al. 2007; Imanishi 2009; Roussel et al. 2006), which have deep silicate absorption features (τ_sil >  2). The normalization is performed by the mean optical depths in the wavelength range 9.8–10.3 μm, which includes no strong lines. The dashed lines show the positions of PAH 7.7, 8.6, and 11.3μm, H₂ S(3) 9.66μm, and [S IV] 10.5μm.