arxiv-15-d003ecd09f0a8f56969e241b9d4d080b-614f3b40a536d0272da9a7571d3ffedc.sc.xz.gpg social-19-7bd5acc007df523de9033bbe7358d8ad-19d59a58e38c492c95c0d1f1683a1240.sc.xz.gpg