Complex sentence: A second character named Carolyn Lance appeared later, portrayed by Lori Loughlin, a retired superhero formerly known as the Black Canary who was the estranged biological mother of Dinah Redmond (played by Rachel Skarsten).
Split into simpler sentences: A second character named Carolyn Lance appeared later, portrayed by Lori Loughlin. The character was the estranged biological mother of Dinah Redmond (played by Rachel Skarsten).