Complex sentence: On March 9,2015, AMC announced it had ordered it to series, with a two-season commitment: the first season, comprising six episodes, premiered on August 23,2015; the second season comprising 15 episodes, will air in 2016.
Split into simpler sentences: On March 9,2015, AMC announced it had ordered it to series, with a two-season commitment. The first season, consisting of six episodes, premiered on August 23,2015, and the second season consisting of fifteen episodes will air in 2016.