Complex sentence: Catherine Willows (née Flynn) is a fictional character on the CBS television series', portrayed by Marg Helgenberger, who has received two Emmy nominations and two Golden Globe nominations for the role.
Split into simpler sentences: Catherine Willows (née Flynn) is a fictional character on the CBS television series'. She is played by Marg Helgenberger, who has received two Emmy nominations and two Golden Globe nominations for the role.