In this task you will be given a passage and a yes/no question based on the passage. You should answer the question using the information from the passage.

passage: The daughter of Snow White and Prince Charming, an ex-bail bonds collector, town sheriff of Storybrooke and Henry Mills' biological mother. Morrison described her character at the beginning of the first season as ''broken, damaged and worldly''. During the fourth season finale, ''Operation Mongoose'', Emma absorbs the power of the Dark One into herself to save Storybrooke In order to successfully create a dark version of Emma, Morrison explained that ''In order to build Dark Emma, I've been doing a bunch of research there with some of their mythology books and old fairy tale books and just looking back through the history of swans and the etymology of 'Swan''' and explained that Emma's rate of evolution ''challenged (her) on a daily basis''. Emma became the primary antagonist of the fifth season's first half, until the end of the season's eighth episode when her real plans are revealed.
question: does emma go dark in once upon a time?
Yes