Task: Question Answering
Input (English): Context: Talia al Ghul is the daughter of the supervillain Ra's al Ghul, half-sister of Nyssa Raatko, on-and-off romantic interest of superhero Batman, and mother of Damian Wayne (the fifth Robin). 
 Question: Which woman was the sister of Talia al Ghul?
Output (English): nyssa raatko