Original sentence: A year later, she was offered a lead role in Star Trek: Deep Space Nine: Farrell starred as Jadzia Dax, the titular ship's Starfleet science officer; a character from an alien species known as the Trill, who is host to a 300-year-old symbiont and can draw upon the memories and knowledge of the symbiont's six previous hosts
Edited sentence: A year later, she was offered a lead role in Star Trek: Deep Space Nine: Farrell starred as Jadzia Dax, the titular space station's Starfleet science officer; a character from an alien species known as the Trill, who is host to a 300-year-old symbiont and can draw upon the memories and knowledge of the symbiont's six previous hosts