Task: Question Answering
Input (English): Passage: Scarlet and Chad are a young married couple. Financial troubles and the death of their infant son convince them to move to Seattle, in the hopes of starting a new life. During the drive, Chad falls asleep at the wheel and runs off the road, crashing their vehicle. Although the car itself is destroyed the couple is unharmed. They go to a nearby farmhouse and meet the owner, "Sam" (short for Samael), his wife Lilith, and their deaf handyman helper, Alal. Sam and Lilith let Chad and Scarlet sleep at their house, but during the night Chad and Scarlet are savagely knocked unconscious by Lilith and Sam.
Upon waking, Chad and Scarlet discover that Sam and Lilith intend to torture and kill them. They nearly drown Scarlet in a barrel, but after they leave the room Chad resuscitates her, and the couple tries to flee the farmhouse. Chad is caught by Lilith, but wrestles away a shotgun from her and knocks her unconscious. Scarlet, aided by Alal, runs away into a vineyard field, but is eventually caught by Sam, who kills Alal and takes Scarlet back into the house. While Sam goes to look for Chad, Lilith tortures Scarlet by scraping the flesh off her knees with a grater. Chad interrupts the torture session and kills Lilith by stabbing her in the head with a meat thermometer. Chad tries to set Scarlet free, but is unable to do so before Sam gets back. Chad and Sam fight, and Scarlet stabs Sam in the back with a chef's knife, seriously injuring him. The couple flees in Sam's pickup truck, but Sam revives and pursues them; Chad runs Sam over with the truck several times before they drive off. 
Question: Who kills the owner of the house?
Output (English): Chad.