This dataset is part of the results for 

Permutationless Many-Jet Event Reconstruction with Symmetry Preserving Attention Networks
Michael James Fenton, Alexander Shmakov, Ta-Wei Ho, Shih-Chieh Hsu, Daniel Whiteson, Pierre Baldi
https://arxiv.org/abs/2010.09206

This dataset is meant to be used with the SPANet library located here:
https://github.com/Alexanders101/SPANet

A complete tutorial for running on this data is available here:
https://github.com/Alexanders101/SPANet/blob/master/docs/TTBar.md