Complex sentence: She is best known for her performances as Eliza Jane Wilder on the television series "Little House on the Prairie" and as Fran Castleberry, the younger straight-laced sister of Polly Holliday's character on the sitcom "Flo".
Split into simpler sentences: She is best known for her performance as Eliza Jane Wilder on the television series "Little House on the Prairie". She also played Fran Castleberry, the younger straight-laced sister of Polly Holliday's character on the sitcom "Flo".