Question: What does the company mine where James T. Prokopanko is a former president?

Context paragraphs:
York Iron Company Mine: York Iron Company Mine is a historic iron mine site located at North Codorus Township, York County, Pennsylvania.  The underground mine was originally opened in 1854, with additional openings dug in 1876-1877.  The mine remained in operation until 1888.

Harco, Illinois: Harco is an unincorporated community in Saline County, Illinois, United States.  The Harrisburg Colliery Coal Company Mine was sunk in November 1916, in the center of section 27, township 8, range 5, Saline County, Illinois, and the town of Harco soon grew up around it.  The name of the town is derived from the first three letters of Harrisburg and the first two letters of Colliery, spelling “Harco.”

James T. Prokopanko: James T. Prokopanko is the former president and Chief Executive Officer of The Mosaic Company and has served in that capacity from January 1, 2007 to August, 2015.  He was a director of the company since October 2004.

Ferraioloite: Ferraioloite is a rare mineral with formula MgMn(FeAl)Zn(PO)(OH)(HO).  It is related to the phosphate mineral falsterite.  Ferraioloite was found in pegmatites of the Foote Lithium Company Mine, Cleveland County, North Carolina, US.  The name honors James (Jim) A. Ferraiolo (1947–2014).

Whipple Company Store: Whipple Company Store is a historic company store located in Whipple, Fayette County, West Virginia, USA.  It was built about 1900, and is a two story, frame octagon building.  It sits on a coursed stone faced foundation and features a prominent arched opening at the main entrance.  As a company store, it remained in operation until August 1957, when the New River Company mine closed.  However, it remained occupied by retail activities until the 1980s.

Coal Hill Coal Railroad: The Coal Hill Coal Railroad began as a coal mine on the north face of Mt. Washington, then known as "Coal Hill", begun by Jacob Beltzhoover in 1825.  This mine was operated by a series of persons, finally by James M. Bailey, who extended the mine completely though the hill to the south side of the hill in 1861.  The mine was then sold to the Pittsburgh Coal Company, and rails from the mine were extended an additional one half mile to a new coal mine on the south side of Saw Mill Run.  The rails were extended to a third mine, for a total length of one and one half miles.  In spite of this short length, the railroad had 3 locomotives and 280 coal cars.  The narrow gauge railroad delivered coal from these mines to South Pittsburgh via an inclined plane, which ran from the northern end of the mine to Carson Street in Pittsburgh, Pennsylvania.  The railroad was sold by the Pittsburgh Coal Company to the Pittsburgh and Castle Shannon Railroad in 1871.  After this sale, the mine was enlarged to form the Pittsburgh and Castle Shannon Tunnel, and the train tracks were extended to Castle Shannon, Pennsylvania.

Sanders Farm: Sanders Farm is a historic home and farm located at Max Meadows, Wythe County, Virginia.  The Brick House was built about 1880, and is a two-story, "T"-shaped, Queen Anne style brick farmhouse.  It features ornamental gables and porches.  Also on the property are the contributing cold frame with a stepped front parapet (c. 1900), a vaulted stone spring house, a one-story brick servants quarters (c. 1880), a cinder block store with an upstairs apartment and an accompanying privy (1950s), a frame vehicle repair shop (c. 1920s), a stone reservoir (1880s) two corn crib, a frame gambrel-roofed barn, a one-story tenant house (c. 1920), stone bridge abutments, and the site of the Hematite Iron Company Mine (late 1880s), a complex of rock formations and tram line beds.

The Mosaic Company: The Mosaic Company is a Fortune 500 company based in Plymouth, Minnesota, a Minneapolis suburb.  Mosaic mines two key crop nutrients—phosphate and potash—and produces specialty products MicroEssentials, K-Mag and Pegasus.  It is the largest U.S. producer of potash and phosphate fertilizer.

Presidency of Benigno Aquino III: The Presidency of Benigno S. Aquino III, also known as Benigno Aquino III Administration, began at noon on June 30, 2010, when he became the fifteenth President of the Philippines, succeeding Gloria Macapagal-Arroyo.  Aquino is the third-youngest person to be elected president, and the fourth-youngest president after Emilio Aguinaldo, Ramon Magsaysay and Ferdinand Marcos.  Aquino is the first president to be a bachelor, being unmarried and having no children.  Aquino is the second president not to drink alcoholic beverages; the first president not to drink alcohol was Emilio Aguinaldo.  Aquino is the eighth president to be a smoker.  Aquino is the first graduate of Ateneo de Manila University to become president.  Aquino is the third president who will only hold office in Malacañan Palace, but not be a resident, following Corazon Aquino and Fidel V. Ramos.  Aquino is the first president to make "Bahay Pangarap" his official residence.  Aquino is the third president to use his second given name, "Simeon", as his middle initial, as Manuel L. Quezon and José P. Laurel did.  Aquino is the second president to be a child of a former president, his mother was former President Corazon Aquino; the first president to be a child of a former president was President Gloria Macapagal-Arroyo, who is the daughter of former President Diosdado Macapagal.

Strataca: Strataca is a salt mine museum in Hutchinson, Kansas, United States.  It was previously known as the "Kansas Underground Salt Museum".  The museum is built within one of the world’s largest deposits of rock salt and provides the opportunity to go 650 ft beneath the Earth’s surface.  It is a unique destination attraction for exploring an environs carved from salt deposits formed 275 million years ago.  The museum is located in the Hutchinson Salt Company mine which began operation in 1923 as Carey Salt Company.  There are 14 other salt mines in the United States, but none of them are accessible to tourists.

Supporting paragraphs: James T. Prokopanko The Mosaic Company
Answer: phosphate and potash