arxiv-19-fee353604c9d762776ee54fbe139e97c-c048364e6cb918d23857fd14e6d728aa.sc.xz.gpg social-3-165a453d7abb94cb2e5a94333e63ac95-0e708df2a172c96b4fcfb2a7f442cd41.sc.xz.gpg