Task: Question Answering
Input (English): Passage: McVeigh rented a storage space in which he stockpiled seven crates of 18-inch-long (46 cm) Tovex sausages, 80 spools of shock tube, and 500 electric blasting caps, which he and Nichols had stolen from a Martin Marietta Aggregates quarry in Marion, Kansas. He decided not to steal any of the 40,000 pounds (18,000 kg) of ANFO (ammonium nitrate/fuel oil) he found at the scene, as he did not believe it to be powerful enough (although he did obtain seventeen bags of ANFO from another source for use in the bomb). McVeigh made a prototype bomb which was detonated in the desert to avoid detection.
Later, speaking about the military mindset with which he went about the preparations, he said, "You learn how to handle killing in the military. I face the consequences, but you learn to accept it." He compared his actions to the atomic bombings of Hiroshima and Nagasaki, rather than the attack on Pearl Harbor, reasoning it was necessary to prevent more lives from being lost.On April 14, 1995, McVeigh paid for a motel room at the Dreamland Motel in Junction City, Kansas. The following day he rented a 1993 Ford F-700 truck from Ryder under the name Robert D. Kling, an alias he adopted because he knew an Army soldier named Kling with whom he shared physical characteristics, and because it reminded him of the Klingon warriors of Star Trek. On April 16, 1995, he drove to Oklahoma City with fellow conspirator Terry Nichols where he parked a getaway car several blocks away from the Alfred P. Murrah Federal Building. The nearby Regency Towers Apartments' lobby security camera recorded images of Nichols's blue 1984 GMC pickup truck on April 16. After removing the license plate from the car, he left a note covering the Vehicle Identification Number (VIN) plate that read, "Not abandoned. Please do not tow. Will move by April 23. (Needs battery & cable)." Both men then returned to Kansas. 
Question: What are the last names of the people who returned to Kansas?
Output (English): Nichols.