Task: Question Answering
Input (English): Passage: In the year 1999 the world is in the midst of an environmental holocaust, the result of a series of solar flares which have scorched the Earth for the last 30 years. Exposure to the flares results in a radiation poisoning which causes the affected to degenerate into psychotic killers. The vast majority of the world's population is dead, the world is desolate and arid, and in the United States the government and military now only control New York City and Washington DC. Otherwise, what is left of humanity is divided between militarised encampments protecting pockets of the unaffected survivors, and roving groups of slavers and scavengers. Unradiated water, gasoline and women have become precious resources which the surviving groups hoard jealously and are willing to kill to obtain.
John Travis, is the leader of a security patrol for one of the compounds led by Prescott when he and his squad are sent to investigate reports of a slaver auction of female captives. Suspecting that notorious bandit leader Wraith is there, he is ordered to break up the auction and kill Wraith if possible. The raid goes badly, however, as the group are forced to open fire, resulting in the deaths of all of Travis' comrades along with several dozen slavers and scavengers. Calling for backup, Travis is told that due to solar flare activity he is not only alone but he cannot be allowed back into the safety of his home compound. Wraith, learning of the identity of his attacker, conducts a ritual sacrifice of a woman and swears before his men that the next sacrifice will be of Travis. 
Question: Who has to break up an auction to try to save women from a bandit leader?
Output (English): John Travis.