Complex sentence: During his five-year reign, Babur took considerable interest in erecting buildings, though few have survived.and became mentally ill and died of thirst because he had promised not to drink water for 14 days.
Split into simpler sentences: During his five-year reign, Babur took considerable interest in erecting buildings, though few have survived. He became mentally ill and died of thirst because he had promised not to drink water for 14 days.