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Fig. 5.

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Sub-sample of 04gs-like (shown in black) ZTF DR2 SNe Ia around maximum light plotted with the spectra of SN 2004gs, SN 1986G, SN 1991bg, and SN 2011fe at similar phases for comparison. The key features identifying these SN Ia are shown in the figure. Each spectrum in the figure is corrected for MW extinction.
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