All reviewers recommend acceptance. Methodology is interesting, but some of the claims in the paper are questionable and multiple references are missing. In the final version, please include the references indicated by R1 and R2 as well as the clarifications requested during reviewing. In particular please correctly relate to prior normalizing flow work to build kinematic priors, published at CVPR 2020 and ECCV2020, and currently not cited, as indicated by R2.