Complex sentence: Laurette Taylor suffered from severe alcoholism for many years, a condition which sharply limited her appearances from the late 1920s through her re-emergence in "Menagerie" in 1945 and which almost certainly contributed to her death from a coronary thrombosis at the relatively young age of 62.
Split into simpler sentences: Laurette Taylor suffered from severe alcoholism for many years, a condition which sharply limited her appearances from the late 1920s throughout her career. Alcoholism almost certainly contributed to her death from a coronary thrombosis at the relatively young age of 62.