TASK DEFINITION: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
PROBLEM: Passage: He began his career at Rangers, where he made 2 appearances. Walker made his senior league début in a 1–0 win over Motherwell at Fir Park, coming off the bench to replace Hamed Namouchi. Walker had a six-month loan spell at Clyde in which he made his Bully Wee début in a 1–0 victory at Broadwood Stadium against Ross County. During this time, Walker won the SFL young player of the month award for September 2004. After his short-term deal at Broadwood, Walker went to Sweden for a couple of months but decided to come back home. he joined Morton in July 2005. Walker made his Morton début in a 3–2 (AET) Challenge Cup win over Gretna, in which assistant boss at Morton, Derek Collins, and later-to-be teammate Ryan McGuffie played for the opposition. His senior league debut was the following week against Raith Rovers, in which Morton triumphed 2–0 in front of 3,222 fans. He signed a new contract in May 2009, for another year at Morton. Being out of contract in the summer, and struggling for fitness, Walker was loaned to Brechin City for three months in January 2010. Walker suffered a recurrence of a groin injury, where he underwent surgery but remained at Brechin until April. He was released at the end of the 2009–10 season. After his release from Morton, Walker decided to go part-time and was signed up by ex-manager Jim McInally at East Stirlingshire for the 2010–11 season.
 Link Information: none Answer: none

SOLUTION: How many goals did Ryan McGuffie have for Gretna?

PROBLEM: Passage: Maxima is named after Russian novelist Maxim Gorky. She belongs to a Bengali-speaking Basu family residing in Delhi. She made her debut with Slumdog Millionaire (2009), in which she designed costumes and assisted Danny Boyle, who earned Academy Award for Best Director for the film. Later, she switched to designing costumes with 2013 blockbuster Goliyon Ki Raasleela Ram-Leela. Director Sanjay Leela Bhansali gave her the chance. He later repeated her for his next venture Bajirao Mastani. She was applauded nationally. Sanjay, Priyanka Chopra, Deepika Padukone and Ranveer Singh was all in praise for her dresses on their characters. She earned Filmfare Award for Best Costume Design in 2016 for the film. In 2017, she worked in two films : Bank Chor and Dangal, the latter being the highest grossing Indian film of all time. In 2017, popular designers Manoshi Nath and Rushi Sharma were scheduled to design dresses for Dangal, the highest grossing Indian film of all time. But co-producer Aamir Khan replaced them with her, giving the reason that they charged too much money for the film's budget. The film earned her second Filmfare Nomination.
 Link Information: Maxima is named after Russian novelist Maxim Gorky Answer: Nizhny Novgorod

SOLUTION: Where was the novelist Maxima was named after born?

PROBLEM: Passage: Lewis Warrington III, the grandson of War of 1812 naval hero Commodore Lewis Warrington, was born in Washington, D.C. and later entered the United States Army there. He was assigned to the 4th U.S. Cavalry Regiment as a second lieutenant on June 18, 1867, and then made a first lieutenant on July 31, 1869. Warrington spent most of his career on the Texas frontier and served under Colonel Ranald S. Mackenzie during the Texas-Indian Wars of the 1870s. On December 8, 1874, he and ten cavalrymen pursued a group of hostile Comanche Indians through the Muchague Valley. Both groups were riding at a full gallop and several riders of Warrington's unit were left behind. Warrington personally captured one Indian, turning him over to a trooper whose horse could not continue, and resumed the pursuit with Privates Frederick Bergendahl and John O'Sullivan. After five miles, their horses exhausted, the Comanches dismounted and decided to shoot it out with the troopers. Climbing out of the valley onto the plain, they opened fire on Warrington and his men as they climbed up after them. Warrington eventually became separated from the others and found himself at the mercy of five Comanche warriors. He was forced to fight them off single-handed and, after exhausting his ammunition, used his rifle as a club in hand-to-hand combat. Bergendahl and O'Sullivan found themselves in a similar situation and killed all but one of their attackers. O'Sullivan pursued the lone survivor but was unable to catch him. All three men received the Medal of Honor four months later, Warrington being the only officer of the Indian Wars to receive the award following the battle rather than years afterwards like other officers. Warrington died on January 5, 1879, and was buried in San Antonio National Cemetery.
 Link Information: On February 25, 1871, he assumed command of the 4th U.S. Cavalry at Fort Richardson in Jacksboro, Texas. Answer: the 4th U.S. Cavalry

SOLUTION:
What units did the Colonel Warrington served under inn the Texas-Indian Wars command?