In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Example input: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Example output: Who believes Fagin's gang make wallets and handkerchiefs?.
Example explanation: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.
Q: Passage: Discussion of damming the White River for flood control began in the 1930s, and the U.S. Army Corps of Engineers (CoE) held hearings on building a dam in January 1946. The new dam would create a lake 50 miles (80 km) long, and one arm would extend to Monte Ne. Work on Beaver Dam began in 1960 as the CoE impounded and bought land around the White River. In July 1962, Mary Powell sold Camp Joyzelle to the CoE, and W. T. McWhorten sold his land as well.
The Federal Government required that all cemeteries and burial grounds be moved. This included the Harvey tomb, and it was no easy task. In 1962 contractor Harald Mathis of Springdale took nine days to raze the 40-ton tomb and one to move it. The first attempt broke a flatbed truck. Another contractor from Huntsville with a stronger truck then had to be called in. A new road was laid to the new site of Harvey's tomb. The tomb was placed on the crest of a hill donated by Harvey's longtime friends and neighbors Mr. and Mrs. Kenneth Doescher. Today, the tomb sits on private property visible from the Monte Ne boat launch on Beaver Lake. Relocation of the aging tomb put pressure on it, causing it to crack.The CoE mistakenly believed that the waters of Beaver Lake would cover the area of the large hotels, so those parcels were added to the land they purchased for the project. Dallas Barrack, who owned Oklahoma Row, felt that he had been treated poorly and had received much less than his property was worth. The CoE held a sealed-bid auction and J. G. Gladdens purchased what was left of Missouri and Oklahoma Rows. He planned to move the remnants of Oklahoma Row out of the path of the rising lake waters. In order to do this, it was first necessary to remove the log portion or shell of the hotel. The original windows and doors were dismantled for the move and later reinstalled. The fireplaces, as well as all of the major stonework were later torn down. Also sold at auction were two massive concrete chairs that had been at the base of the amphitheater. They were bought by Mr. and Mrs. Ulis Rose of Rogers and were used to decorate the lawns of their Town and Country restaurant and motel. The chairs are still located in Rogers; however, they now sit unceremoniously in Frisco Park without any plaque or marker indicating their significance. The concrete couch was left in place at the base of the amphitheater, because no one wanted to try to move it.
A:
What is the last name of the couple that bought the two massive concrete chairs at the auction?