In this task, you are given a set of context paragraphs, some supporting facts and an answer of a question. Your task is to generate question for given answer based on set of context paragraphs, supporting facts and an answer.

Context_1 : CVR Partners LP () is a public traded company, based in Sugar Land, Texas, that manufactures and provides nitrogen fertilizer products. It is a subsidiary of Coffeyville Resources, which is owned by CVR Energy Inc. The company was formed by CVR Energy to operates its nitrogen fertilizer business. CVR Energy, Inc. was listed as a 2012 Fortune 500 company with NO.5 ranking in Houston Chronicle. Context_2 : Fauji Fertilizer Company Energy Limited(FFC Energy Ltd or FFCEL), in 2012 completed a 49.5 MW wind Energy Farm at Jhimpir, Sindh, Pakistan near Karachi. Contract of supply of mechanical design was awarded to Nordex and Descon Engineering Limited. Nordex a German wind turbine manufacturer. Pakistani Govt. also has issued LOI of 100 MW Wind power plant to FFCEL. Pakistani Govt. has plans to achieve electric power up to 2500 MW by the end of 2015 from wind energy to bring down energy shortage. The ADB financed $143 million Jhimpir windmill project, which is being executed by Zorlu Energy Pakistan, the local subsidiary of a Turkish company, on the land of 1148 acres at Jhimpir in Thatta District of Sindh province. Context_3 : The Taiwan Fertilizer Co., Ltd. (TFC; ) is a fertilizer company of Taiwan. Context_4 : Hall is a hamlet (and census-designated place) in Ontario County, New York, United States, near the city of Geneva, along State Route 14A in the Town of Seneca. Located in the Finger Lakes region, Hall has a fire department and a post office with a downtown zip code of 14463, though the urbanized area extends beyond this. Hall also has various agricultural enterprises, including a John Deere tractor dealer, a seed production company (Seedway), and a fertilizer company (Hall Fertilizer Corp.). Seedway, a subsidiary of Growmark, serves the entire Northeast and is headquartered in Hall. Context_5 : Rentech, Inc. (stands for Renewable Energy Technology) is a Los Angeles, California, based United States company that owns and operates wood fiber processing and nitrogen fertilizer manufacturing businesses. It provides wood chipping and wood pellet services through a subsidiary Fulghum Fibres, Inc. and sells nitrogen fertilizer through Rentech Nitrogen Partners, L.P. In addition, Rentech owns the intellectual property for a number of energy technologies, such as RentechSilvaGas Gasification Process and FischerTropsch process based Rentech Process. Context_6 : CF Industries Holdings, Inc. is a North American manufacturer and distributor of agricultural fertilizers, based in Deerfield, Illinois, a suburb of Chicago. It was founded in 1946 as the Central Farmers Fertilizer Company. For its first 56 years, it was a federation of regional agricultural supply cooperatives. CF then demutualized, and became a publicly traded company. Context_7 : Terra Nitrogen Company, Limited Partnership is an American company that was set up on September 20, 1991 and now is headquartered in Deerfield, Illinois. The company markets nitrogen fertilizers, most of which are anhydrous ammonia and urea ammonium nitrate solutions (UAN). Terra Nitrogen Company (TNCLP) is a subsidiary of CF Industries and Terra Nitrogen, L. P. (TNLP) is the operating partner of TNCLP. Context_8 : EuroChem (Russian: ) is a nitrogen and phosphate fertilizer company headquartered in Zug, Switzerland. It has mining activities in Kovdor, Murmansk Oblast, Russia, and in Kazakhstan, as well as oil and gas operations in Novy Urengoy, Yamalo-Nenets Autonomous Okrug, Russia. The company's production facilities are located in Russia, Belgium and Lithuania. Context_9 : Fauji Fertilizer Company Limited (FFC) is the largest chemical fertilizer producer of Pakistan with biggest market share in the country. It was established by the Fauji Foundation which holds a controlling interest. Context_10 : Fertilizer trees are used in agroforestry to improve the condition of soils used for farming. They capture nitrogen from the air and put it in the soil through their roots and falling leaves. They can also bring nutrients from deep in the soil up to the surface for crops with roots that cannot reach that depth. Fertilizer trees are further useful for preventing fertilizer erosion, soil degradation and related desertification, and improving water usage for crops. "Sesbania", "Gliricidia", "Tephrosia", and "Faidherbia albida" are known as fertilizer trees. Tree Lucerne or Tagasaste ("Cytisus proliferus") is a well known fertilizer tree, able to fix more than 587kg of nitrogen per hectare per year. It can increase maize yields from 1 ton per hectare per year to more than 10 tons ha/year in areas with more than 850mm of rain per year or a perched water table. Tree Lucerne is also used to create and maintain terra preta. fact_1 : Terra Nitrogen Company (TNCLP) is a subsidiary of CF Industries and Terra Nitrogen, L. P. (TNLP) is the operating partner of TNCLP. fact_2 : It was founded in 1946 as the Central Farmers Fertilizer Company. Answer: CF Industries
Terra Nitrogen Company is a subsidiary of what company that was founded in 1946 as the Central Farmers Fertilizer Company?