Complex sentence: A severe drought in the Yangtze and Huai river valleys occurred in the year 1012 and in response Emperor Zhendong ordered the drought-resistant Champa rice to be delivered to his kingdom.
Split into simpler sentences: A severe drought in the Yangtze and Huai river valleys occurred in the year 1012. In response, the Emperor Zhendong ordered the drought-resistant Champa rice to be delivered to his kingdom.