Complex sentence: One day after horseback riding, the Queen began to feel a severe pain in the stomach which made her to lay on her bed during the rest of the evening, and she died on the following night, on 12 February 1689.
Split into simpler sentences: One day after horseback riding, the Queen began to felt a severe pain in the abdomen causing her to lay down the rest of the evening. She died on the following night, on 12 February 1689.