Question: What member-owned agricultural copperative own Purina Mills, LLC?

Context paragraphs:
Caves Valley Golf Club: Caves Valley Golf Club is a member-owned not-for-profit corporation in Owings Mills, Maryland, a suburb northwest of Baltimore.  The golf course opened in 1991, and is known for its fast greens, rolling fairways, and water hazards; it was rated as 47th among America's best modern courses by "Golfweek" magazine in 1997.

Weavers Way Co-op: Weavers Way Co-op is a member-owned consumers' cooperative with stores open to everyone, based in Northwest Philadelphia.  Founded in 1973 as a neighborhood food buying club in a church basement in Philadelphia's West Mt. Airy section, Weavers Way has grown to more than 5,200 member households, with annual sales of nearly $20 million.  After moving to its location at 559 Carpenter Lane, Weavers Way expanded, purchasing the adjacent building and consolidating the two buildings.  Subsequent expansions included the purchase of other buildings in the neighborhood, which house a pet supply store, health and wellness store and offices.  In 2010, Weavers Way underwent a major expansion, adding a second grocery store in Chestnut Hill, at 8424 Germantown Ave., at the former Caruso's grocery store site.  Then, in 2013, Weavers Way opened a health and beauty specialty store, also in Chestnut Hill.  For several years, Weavers Way also ran a smaller store in the West Oak Lane section of Philadelphia, but that closed in September 2011.  The Co-op rents warehouse space in the SHARE food pantry complex in the Nicetown neighborhood.  Two farm operations comprise 5.5 acres, one at Awbury Arboretum in Germantown and one on the grounds of Saul Agricultural High School in Roxborough.  Weavers Way has participated in such events and organizations as Mt. Airy Day, Mt. Airy ArtJam, Mt. Airy YouthWorks, Mt. Airy Business Association, Mt. Airy USA (MAUSA), Mt. Airy Village Fair, Chestnut Hill's Fall for the Arts Festival and the XPoNential Music Fest.

Purina Mills: Purina Mills, LLC is the farm animal feeds unit of Land O' Lakes.  It was previously part of Ralston Purina, but the U.S. animal feeds portion was sold in 1986.

North Fork Valley Rural Historic District: North Fork Valley Rural Historic District is a national historic district located near Blacksburg, Montgomery County, Virginia.  The district encompasses 125 contributing buildings, 5 contributing sites, and 18 contributing structures.  It consists of a significant rural landscape and an important collection of domestic and agricultural buildings, reflecting important agricultural practices in the region from 1745-1940.  It includes domestic and agricultural buildings, a historic archaeological site, as well as an early-20th century school, two late-19th century churches, and five mid- to late-19th century industrial resources including three standing mills, a tanyard site, and a brick kiln site.

Allis-Chalmers: Allis-Chalmers was a U.S. manufacturer of machinery for various industries.  Its business lines included agricultural equipment, construction equipment, power generation and power transmission equipment, and machinery for use in industrial settings such as factories, flour mills, sawmills, textile mills, steel mills, refineries, mines, and ore mills.  The first Allis-Chalmers Company was formed in 1901 as an amalgamation of the Edward P. Allis Company (steam engines and mill equipment), Fraser & Chalmers (mining and ore milling equipment), the Gates Iron Works (rock and cement milling equipment), and the industrial business line of the Dickson Manufacturing Company (engines and compressors).  It was reorganized in 1912 as the Allis-Chalmers Manufacturing Company.  During the next 70 years its industrial machinery filled countless mills, mines, and factories around the world, and its brand gained fame among consumers mostly from its farm equipment business's orange tractors and silver combine harvesters.  In the 1980s and 1990s a series of divestitures transformed the firm and eventually dissolved it.  Its successors today are Allis-Chalmers Energy and AGCO.

Land O'Lakes: Land O'Lakes, Inc. is a member-owned agricultural cooperative based in the Minneapolis-St.  Paul suburb of Arden Hills, Minnesota, focusing on the dairy industry.  The co-op states that it has about 3,600 direct producer-members, 1,000 member-cooperatives, and about 10,000 employees who process and distribute products for about 300,000 agricultural producers; handling 12 billion pounds of milk annually.  It is ranked third on the National Cooperative Bank Co-op 100 list of mutuals and cooperatives.  The co-op is one of the largest producers of butter and cheese in the United States.

Henry Clay Mills House: The Henry Clay Mills House is a historic house at 425 North 15th Street in Van Buren, Arkansas.  This modest frame house was built in 1892 by Henry Clay Mills, an African-American former slave turned businessman.  Mills was born into slavery in 1847, and after the American Civil War worked for many years as a laborer on a plantation near Mulberry.  He eventually developed a moving and shipping business in Van Buren, typifying advancement of African-Americans of the period from agricultural to non-agricultural economic opportunities.

Windmills in Leeuwarden: The city of Leeuwarden, Friesland, the Netherlands has had at least 130 windmills over the centuries.  Only one, the "Froskepôlemolen" survives today within Leeuwarden.  Six other mills which have stood in Leeuwarden survive elsewhere in the Netherlands.  The mills had a wide range of industrial and agricultural uses.  The industrial uses include the processing of bark for tanning leather, the fulling of cloth, the production of cement, the production of dyes, the extraction of oil (including the production of paints), the grinding of tobacco to produce snuff, the production of gunpowder, and the sawing of timber.  Agricultural uses include the milling of buckwheat, oats, rye and wheat, the processing of chicory, the production of pearl barley, and the pumping of water.

Mount Danforth: Mount Danforth ( ) is an ice-free, pyramidal mountain over 2,000 m high, standing immediately east of Mount Zanuck on the south side of Albanus Glacier, in the Queen Maud Mountains.  It was discovered in December 1934 by the Byrd Antarctic Expedition geological party under Quin Blackburn, and named by Richard E. Byrd for William H. Danforth of the Purina Mills, St. Louis, a contributor to the expedition.

Cookie Crisp: Cookie Crisp is a breakfast cereal that attempts to recreate the taste of chocolate chip cookies.  It is manufactured by General Mills in the United States and Cereal Partners (under the Nestlé brand) in other countries.  Introduced in 1977, it was originally manufactured by Ralston Purina until they sold the trademark to General Mills in 1997, who soon after changed the recipe.

Supporting paragraphs: Purina Mills Land O'Lakes
Answer: Land O'Lakes