Task: Question Answering
Input (English): Passage: Annie Walker is a single woman in her mid-thirties, living in Milwaukee. Following the failure of her bakery due to the recession, her boyfriend left her, and she lost her savings, forcing her to take a job as a sales clerk in a jewelry store and share an apartment with an English immigrant roommate Gil and his sister Brynn. Her business failure was so painful that she has given up baking entirely. Annie has a no-strings-attached sexual relationship with the self-absorbed Ted, but she hopes for something more from him. Her best friend, Lillian, is virtually her only source of happiness.
Lillian becomes engaged and asks Annie to be her maid of honor. At the engagement party, Annie meets Lillian's bridesmaids: cynical, worldly, long-married cousin Rita; naïve and idealistic newlywed friend from work Becca; the groom's decidedly unfiltered sister Megan; and Helen, the rich, beautiful, and elite wife of the groom's boss. Helen and Annie, who are jealous of each other's friendship with Lillian, take an instant dislike to each other, but Lillian persuades them to spend time together. 
Question: Who is the sister of the roommate of the woman that the bride asks to be maid of honor?
Output (English): Brynn.