Complex sentence: Years later, Basco stole the greater power of Changemen from Hayate, then he later called Goro Hoshino of the United Airforce Overtech Hardware to alert him of Basco's actions.
Split into simpler sentences: Years later, Basco stole the greater power of Changemen from Hayate. Then he later called Goro Hoshino of the United Airforce Overtech Hardware to alert him of Basco's actions.