Complex sentence: Flynn's big acting break came when he was chosen to portray the character Chase Matthews on the Nickelodeon show Zoey 101, a show about a girl (portrayed by Jamie Lynn Spears) and her friends who go to a boarding school in California.
Split into simpler sentences: Flynn's big acting break came when he was chosen to portray the character Chase Matthews on the Nickelodeon show Zoey 101. A show about a girl (portrayed by Jamie Lynn Spears) and her friends who go to a boarding school in California.