Lower limit on the bulk Lorentz factor as a function of the isotropic-equivalent energy released during all three episodes. The lower limits are determined using two methods: the afterglow deceleration time (squares) and γ–γ absorption (circles). The color bar indicates the corresponding luminosity distance to DBE. For comparison, we show total isotropic-equivalent energy measured for Swift J2058+05 (Cenko et al. 2012; Pasham et al. 2015) and Swift J1644+57 (Burrows et al. 2011) as dashed blue and red vertical lines.