Complex sentence: Commander Carrier Strike Group One (COMCARSTRKGRU 1 or CCSG 1) is is responsible for unit-level training, integrated training, and material readiness for the ships and aviation squadrons assigned to the group.
Split into simpler sentences: Commander Carrier Strike Group One (COMCARSTRKGRU 1 or CCSG 1) is the command authority for Carrier Strike Group One. This flag officer is responsible for unit-level training, integrated training, and material readiness for the ships and aviation squadrons assigned to the group.