Observation of an Unusual Upward-Going Cosmic-Ray-like Event in the Third Flight of ANITA - Gorham,PW; Rotter,B; Allison,P; Banerjee,O; Batten,L; Beatty,JJ; Bechtol,K; Belov,K; Besson,DZ; Binns,WR; Bugaev,V; Cao,P; et al. (PHYSICAL REVIEW LETTERS, 2018)