Complex sentence: According to the "Records of the Grand Historian", Tantai Mieming (Ziyu) was born in 512 BC, 39 years younger than Confucius, but the "Kongzi Jiayu" says he was 49 years younger.
Split into simpler sentences: According to the "Records of the Grand Historian", Tantai Mieming (Ziyu) was born in 512 BC, 39 years younger than Confucius. However, the "Kongzi Jiayu" says he was 49 years younger.