Acknowledgments. We thank Yao Feng, Soubhik Sanyal,
Hongwei Yi, Qianli Ma, Chun-Hao Paul Huang, Weiyang
Liu, and Xu Chen for their feedback and discussions,
Tsvetelina Alexiadis for her help with perceptual study,
Taylor McConnell assistance, Benjamin Pellkofer for web-
page, and Yuanlu Xu’s help in comparing with ARCH and
ARCH++. This project has received funding from the Eu-
ropean Union’s Horizon 2020 research and innovation pro-
gramme under the Marie Skłodowska-Curie grant agreement
No.860768 (CLIPE project).

8

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