Task: Explanation
Input (English): Ellie is a fictional character in the 2013 video game "The Last of Us", and the main protagonist of the upcoming video game "The Last of Us Part II". In the first game, the character Joel is tasked with escorting Ellie across a post-apocalyptic United States in an attempt to create a potential cure for an infection to which Ellie is immune. She is voiced by Ashley Johnson, who also provided motion capture for the character. While players briefly assume control of Ellie for a portion of the game, the computer's artificial intelligence primarily controls her actions, often assisting in combat by attacking or identifying enemies. Ellie reappeared as the sole playable character in the downloadable content prequel campaign, "", in which she spends time with her friend Riley. Ellie is also the main character in the comic book prequel, "", wherein she befriends Riley and has her first encounter with the rebel group the Fireflies. Question: What game with Ellie as the main protagonist was announced at the PlayStation Experience event in December 2016? Answer: The Last of Us Part II
Output (English): Ellie is a fictional character in the 2013 video game The Last of Us, and the main protagonist of the upcoming video game The Last of Us Part II.