Complex sentence: In September, 2014, AMC ordered a pilot, which was written by Kirkman and Dave Erickson, and directed by Adam Davidson, and is executive produced by Kirkman, Erickson, Gale Anne Hurd, and David Alpert, with Erickson serving as showrunner.
Split into simpler sentences: In September, 2014, AMC ordered a pilot, which was written by Kirkman and Dave Erickson, and directed by Adam Davidson. It is executive produced by Kirkman, Erickson, Gale Anne Hurd, and David Alpert, with Erickson serving as showrunner.