Complex sentence: In the dining hall, Jon appoints Ser Alliser (Owen Teale) as the new First Ranger, and Janos Slynt (Dominic Carter) as the commander of Greyguard, a ruined castle which Slynt must restore.
Split into simpler sentences: In the dining hall, Jon appoints Ser Alliser (Owen Teale) as First Ranger. He also appoints Janos Slynt (Dominic Carter) as the commander of Greyguard, a ruined castle which Slynt must restore.