Task: Question Answering
Input (English): Passage: FBI Regional Bureau Chief Gordon Cole sends agents Chester Desmond and Sam Stanley to investigate the murder of drifter and teenage prostitute Teresa Banks in the town of Deer Meadow, Washington. The pair are informed about their new assignment through a woman named Lil. On her lapel is a tiny, artificial blue rose, clearly symbolic of something; when Sam asks, Chet simply replies, "But I can't tell you about that." Desmond and Stanley view Teresa's body at the local morgue. They notice that a ring is missing from her finger and a small piece of paper printed with the letter "T" has been inserted under one of her fingernails. Later, Desmond discovers Teresa's missing ring under a trailer. As he reaches out to it, he is taken by an unseen force.
At FBI headquarters in Philadelphia, Cole and Agent Dale Cooper experience a brief vision of their long-lost colleague Agent Phillip Jeffries. He tells them about a meeting he witnessed involving several mysterious spirits — The Man from Another Place, Killer BOB, Mrs. Chalfont and her grandson. Agent Cooper is sent to Deer Meadow to investigate Desmond's disappearance, but finds no answers.
One year later in Twin Peaks, high school homecoming queen Laura Palmer and her best friend Donna Hayward attend school. Laura is addicted to cocaine and is cheating on her boyfriend, the arrogant and ill-tempered jock Bobby Briggs, with the biker James Hurley. Laura realizes pages are missing from her secret diary, and gives the rest of the diary to her friend, the agoraphobic recluse Harold Smith.
Mrs. Chalfont and her grandson appear to Laura. They warn her that the "man behind the mask" is in her bedroom. Laura runs home, where she sees BOB. She rushes outside in terror and is startled to see her father, Leland, emerge from the house. That evening Leland's behavior is erratic and abusive—he accusingly asks her about her romances, then tenderly tells her he loves her. 
Question: What is the first name of the person whose warned that the "man behind the mask" is in their bedroom?
Output (English): Laura.