Fig. 1.

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Selection of spectra of a sample SN 1994W-like events, including SNe 1994W (Chugai et al. 2004), 1999eb (see Sect. 3), 1999el (see Sect. 2.1.4), 2003G (Shivvers et al. 2017), 2005cl (Kiewe et al. 2012), 2006bo (Taddia et al. 2013), 2009kn (Kankare et al. 2012), 2011ht (Humphreys et al. 2012; Pastorello et al. 2019b), and 2020pvb (Elias-Rosa et al. 2024). The spectra were dereddened by the total line-of-sight extinction estimates and the wavelengths corrected to the host galaxy rest frame.
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