Please answer the following question: Generate a question about the following movie plot: Three sisters, Brielle, Kelli, and Sam, are on a college break. They discover that their grandfather has just died and he has left them a motel in his will. Their father, John, tries to persuade them not to go, but the sisters ignore him and head off, accompanied by their friends: Tanya, Ben, Bill, and Bill's girlfriend, Amy. Sam is the first to arrive, and while drinking wine in Room 6, two inbreds forcefully enter and attack Sam, where with a collection of duct tape, an iron bar, and an axe, they bind Sam's legs with the tape, place the iron bar beside her ankles, and use the axe head to force the bar through both her ankles. Afterwards, the three are in a boat, where the inbreds tie a badly beaten Sam's legs to a concrete block, and dump her into the water, where she is still alive as the concrete block pulls her beneath the water, where she drowns. The rest drive to the motel and meet the caretaker, an old lady who appears kind. After finding a lake on their property, the group of friends take a swim, not noticing that Sam's dead body is floating in the lake beneath them. After the swim, the friends return to their trailer, where they set up a small campsite. Bill and Tanya go out to the woods to get some firewood, and end up having sex (much to the chagrin of Amy). After encounters with large, strange-looking, unkempt men, the friends are terrified. Bill, Tanya, and Amy are butchered, while the remaining friends escape but are picked up by a mysterious, pushy cop. He tricks them into coming back to the motel where everything slowly falls into place. It is later revealed that the cop and caretaker are all a part of the evil scheme to make Brielle and Kelli a part of their devious plans. The cop and caretaker are in fact son and mother, respectively, and their family has been perpetuated by incest for generations (hence the inbred characteristics of the two aforementioned unkempt men). It becomes apparent that the girls' father had rejected the family "tradition" and escaped. Their grandmother found out...
Answer:
Who is butchered?