In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.
--------
Question: Passage: Cowboy drifter Jim Garry is summoned by his friend, smooth-talking Tate Riling. Garry rides into an Indian reservation and finds himself in the middle of a conflict between a cattle owner and some homesteaders. He meets cattle owner John Lufton, and eventually his daughters Amy and Carol. The Luftons suspect that Garry is on Riling's side and are initially hostile, especially Amy. Garry readily admits that he is going to work for his friend.
Riling tells Garry that he and Indian agent Jake Pindalest have devised an elaborate scheme to force Lufton into selling his herd cheaply. Pindalest has gotten the government to order Lufton to remove his cattle from the reservation in a week. Meanwhile, Riling has organized the homesteaders into blocking the move, conning them into believing that he is working in their best interests. With no other option, Lufton would have to sell his herd at bargain prices or lose everything. Lufton would never sell to Riling, but he would to a stranger like Garry. Pindalest would then see that the government buys the herd at an inflated price. Garry would get $10,000 for his part in the swindle.
Lufton manages to outsmart Riling and move his herd unimpeded, but Riling and his men stampede and scatter the cattle back onto the reservation. It would take several days to gather the herd, more time than Lufton has before the deadline. Garry becomes disgusted when a man is killed in the stampede, and he switches sides. Amy still does not trust him. She suspects Garry of betraying the contents of a letter to Riling, unaware that Carol is enamored with Riling and is the one passing information to him. Eventually, Amy comes to trust (and fall in love with) Garry, especially after he defends her father from two of Riling's men. 
Question: Who are the people Riling has believing that his is working in their best interest?

Answer: the homesteaders.


Question: Passage: Sherman 'Tank' Turner is a help line operator and a ladies man with a hobby: If a guy loses a girl and wants her back, he gets in touch with Tank and pays him to take the girl on a bad date.  Throughout the evening Tank inevitably behaves in the most moronic fashion causing the girl to realize that her ex was not really such a bad guy after all and get back to their ex.
He shares an apartment with his step cousin Dustin who has fallen for his colleague Alexis. Dustin takes Alexis on a date and confesses his love but she insists they remain friends. After the date Dustin explains his situation to Tank who volunteers his services as a good friend (instead of having to pay for his services as usual). Dustin initially turns him down, not wanting Tank to be close to Alexis, but the next day sees Alexis flirting with another co-worker and begs Tank to take Alexis out. He accepts.
Tank bumps into Alexis and they arrange to go out.  He behaves badly all night but Alexis is too drunk to care. When he drops her off she expects him to come in but he resists the temptation out of loyalty to Dustin. Alexis calls Dustin but when they meet she explains that her date with Tank has motivated her to see other men.  Dustin sends Alexis roses and an apology poem in Tank's name. Alexis calls Tank at work and berates him for leaving early the previous night.  Tank goes to see Alexis and they end up having casual sex on a regular basis while Dustin begins a series of desperate attempts to stay friends with her after all. 
Question: What is the alias of the person who volunteers his services to his cousin?

Answer: Tank.


Question: Passage: Dr. Robert "Rack" Hansen, a veterinarian in rural Verde Valley, Arizona, receives an urgent call from a local farmer, Walter Colby. Colby is upset because his prize calf has become sick for no apparent reason, and the animal is brought in to Hansen's laboratory. Hansen examines the calf, which dies shortly afterward. Hansen tells Colby he cannot explain what made the animal so ill so quickly, but takes samples of the calf's blood to a university lab in Flagstaff.
A few days later, Diane Ashley, an arachnologist, arrives looking for Hansen. Ashley tells Hansen that the calf was killed by a massive dose of spider venom, which Hansen greets with skepticism and disbelief. Undaunted, Ashley tells him the problem is serious and that she wishes to examine the animal's carcass and the area where it became sick. Hansen escorts Ashley to Colby's farm; and moments after they arrive, Colby's wife, Birch, discovers their dog is also mysteriously dead. Ashley performs a quick chemical test on the dog's carcass and concludes that like the calf, it died from a massive injection of spider venom. Hansen is incredulous, until Colby states that he recently found a massive "spider hill" on a back section of his farmland. He takes Hansen and Ashley to the hill, which is covered with tarantulas. Ashley theorizes that the tarantulas are converging together due to the heavy use of pesticides, which are eradicating their natural food supply. In order to survive, the spiders are joining forces to attack and eat larger animals--and humans. 
Question: What is the full name of the person who takes samples of the calf's blood to a university lab?

Answer:
Dr. Robert "Rack" Hansen.