Complex sentence: In 1999, Stanford oncologist, Dr George Fisher, declared she had been cured, but when the cancer cells returned in May 2000, Rio travelled back to Stanford for another eight-hour surgery and a round of chemotherapy sessions.
Split into simpler sentences: In 1999, Stanford oncologist Dr George Fisher, declared she had been cured. When the cancer cells returned in May 2000, Rio travelled back to Stanford for an eight-hour surgical procedure and another round of chemotherapy sessions.