Complex sentence: In September 1999 Lena was admitted to University Hospital of Wales in Cardiff for the psychosurgical operation it was described as "pioneering" and "keyhole surgery to partially interrupt the nerve pathways that control emotions".
Split into simpler sentences: In September 1999 Lena was admitted to University Hospital of Wales in Cardiff for the psychosurgical operation. It was described as "pioneering" and "keyhole surgery to partially interrupt the nerve pathways that control emotions".