Complex sentence: West is best known for her role as Crystal Anderson, Dan's TV stepmother, on the 1988 to 1997 ABC sitcom "Roseanne", on which she was a regular cast-member for seasons three and four and a recurring guest before and afterward.
Split into simpler sentences: West is best known for her role as Crystal Anderson, Dan's TV stepmother, on the 1988 to 1997 ABC sitcom "Roseanne". She was a regular cast-member for seasons three and four and a recurring guest before and afterward.