Analysis of the first Genetic Engineering Attribution Challenge. - Oliver M. Crook; Kelsey Lane Warmbrod; Greg Lipstein; Christine Chung 002; Christopher W. Bakerlee; T. Greg McKelvey Jr.; Shelly R. Holland; Jacob L. Swett; Kevin M. Esvelt; Ethan C. Alley; William J. Bradshaw (CoRR, 2021)