Original: She worked there for fifty years, and became one of the most popular actors there, but she never became a star because of the parts she played; she always played old women in comedies, never heroines and therefore seldom main parts.
Simplified: She worked there for fifty years, and became one of the most popular actors there. But she never became a star because of the parts she played; she always played old women in comedys, never heroines and main parts.