Task: Question Answering
Input (English): Passage: It has been eighteen months since Kurt Sloane killed Tong Po and avenged the death of his brother Eric. Now a professional mixed martial artist, Kurt defeats Renato Sobral using a move he calls the "Hurricane Armbar", a hurricanrana into an armbar. Kurt has been plagued by nightmares where he and his wife Liu are on a train and he finds himself fighting on the train which ends with him falling into water and possibly drowning. After the fight, Kurt is met by two U.S. Marshals who inform him that he must return to Thailand to be implicated in the death of Tong Po. When Kurt asks to see one of the Marshal's badges, he is tasered. 
Awakening in a prison in Thailand, Kurt meets Thomas Tang Moore, the mastermind behind the underground tournament where Kurt, Eric, and Tong Po have competed. Moore tells Kurt that when Tong Po was defeated, he was to remain there as the new champion, but instead with Kurt returning home, Moore needed to find a new champion. Moore offers Kurt to fight the new champion, Mongkut, a 6'8" 400-lb. fighter. Kurt finds himself taunted by Crawford, Tong Po's former right hand man who is working for Moore. Moore offers Kurt $1 million to fight Mongkut, but Kurt refuses. Stuck in prison, Kurt finds himself under constant threat from various prisoners, in which he then finds himself whipped by the prison guards each night. During one encounter, Kurt runs into Briggs, an American boxer who soon bonds with Kurt and even offers him a way to go through the pain from the whippings. Kurt also soon learns that his Muay Thai teacher, Durand, is now training some of the prisoners, but reveals that for his troubles, he has been blinded. 
Question: What are the first names of the two people riding on the train?
Output (English): Liu.