The attached file is the part of a paper, I need the summary of this part. You can put the picture from this paper into the summary. I need 1.5 ~ 2 pages. If you need the original paper, the link is: https://arxiv.org/pdf/1901.05719.pdf?fbclid=IwAR3PdeB_a9DRgoLZ3M4FF72S7C_0_Q-Rmr6Qeq6O4ZqJekC_P-mSS3egk0w
P.S. I need it in 24 hours.