fwXmachina example: Missing transverse energy regression

Dataset used in the MET estimation problem of https://arxiv.org/abs/2207.05602. Different algorithms were used to calculate missing transverse energy of QCD multijet background, VBF Higgs decaying to invisible particles, and ttbar. For each event, all the MET estimates and rho energy density values are reported here. Details of the algorithms and the variable descriptions can be found in our paper.