Complex sentence: Ba Jin suffered from Parkinson's Disease since 1983, an ailment which almost completely debilitated him and confined him to a hospital unable to speak and walk toward the last few years of his life.
Split into simpler sentences: Ba Jin suffered from Parkinson's Disease since 1983, an ailment which almost completely debilitated him. The illness confined him to a hospital unable to speak and walk toward the last few years of his life.