Question: What railroad company acquired the Johnsonburg, Kane, Warren and Irvine Railroad?

full_context: Document 1: Burlington Northern Railroad: The Burlington Northern Railroad (reporting mark BN) was a United States-based railroad company formed from a merger of four major U.S. railroads. Burlington Northern operated between 1970 and 1996.
Document 2: Johnsonburg, Kane, Warren and Irvine Railroad: The Johnsonburg, Kane, Warren and Irvine Railroad (reporting mark JKWI) was a railroad company in Pennsylvania, United States, formed on May 24, 1982, by Sloan Cornell who also owned the Knox and Kane Railroad. The JKWI was the designated operator of the Irvine, Warren, Kane & Johnsonburg Railroad, that was a partnership of Brock Railroad (a wholly owned subsidiary of Warren Car Company), Irvine Railroad (a wholly owned subsidiary of National Forge Company) and Struthers Wells Inter-American Corporation (a subsidiary of Struthers Wells), all three being Pennsylvania corporations, and had acquired from Conrail the following railroad line segments: MP 58.52 to MP 66.7 (Irvine to Warren) and MP 92.5 to MP 111.0 (Kane to Johnsonburg).
Document 3: Youngstown and Austintown Railroad: Youngstown and Austintown Railroad is a short-line railroad that exists just west of Youngstown, Ohio, United States. It is owned by Genesee & Wyoming Inc. It connects with the Youngstown Belt Railroad which is owned by the same company and CSX at Yanda. The YARR is essentially two former Erie branch Lines. The line come together at M&T Jct. (near Meridian Road). The lines are very short and they service the steel industry in Youngstown. For years the largest customer on the YARR was Youngstown Steel Door and United Freezer Storage. The first operator of the YARR was Jerry Jacobson. The original YARR rostered an Alco switcher and former P&LE GP7 1501. The one-stall enginehouse still stands today in Austintown on Oakwood Ave. A small section of the structure was constructed by the Erie railroad.
Document 4: South Improvement Company: The South Improvement Company was a Pennsylvania corporation in 1871-1872. It was created by major railroad interests, but was widely seen as part of John D. Rockefeller's early efforts to organize and control the oil and natural gas industries in the United States which eventually became Standard Oil. Although it lasted less than a year and never shipped any oil, the South Improvement Company scheme caused widespread attention to be focused on the relationships between big railroads and big businesses which wanted and demanded favorable treatment.
Document 5: CSX Transportation: CSX Transportation (reporting mark CSXT) is a Class I railroad in the United States. The main subsidiary of the CSX Corporation, the railroad is headquartered in Jacksonville, Florida, and owns about 21,000 route miles (34,000 km). CSX operates one of the three Class I railroads serving most of the East Coast, the other two being the Norfolk Southern Railway (NS) and Canadian Pacific Railway. It also serves the Canadian provinces of Ontario and Quebec. Together CSX and Norfolk Southern Railway have a duopoly over all east-west freight rail traffic east of the Mississippi River. As of August 8, 2017, CSX's total public stock value was slightly over $41.5 billion.
Document 6: List of CSX Transportation lines: CSX Transportation owns and operates a vast network of rail lines in the United States east of the Mississippi River. In addition to the major systems which merged to form CSX - the Baltimore and Ohio Railroad, Chesapeake and Ohio Railway, Louisville and Nashville Railroad, Atlantic Coast Line Railroad and Seaboard Air Line Railroad - it also owns major lines in the Northeast acquired from the 1998 breakup of Conrail.
Document 7: V&amp;S Railway: The V&S Railway (reporting mark VSR) is a shortline railroad that operates two disconnected lines in the U.S. state of Kansas. It is affiliated with A&K Railroad Materials, a scrap dealer whose primary business is buying marginal rail lines with the intent of abandoning them and selling the material as scrap for immediate cash. The company acquired its first line, a former Atchison, Topeka and Santa Fe Railway line between Medicine Lodge and a BNSF Railway junction at Attica, from the Central Kansas Railway in 2000. In 2006 it expanded its operations by acquiring from the Hutchinson and Northern Railway (reporting mark HN) a short segment of former interurban in eastern Hutchinson, where it interchanges with the BNSF Railway, Union Pacific Railroad, and Kansas and Oklahoma Railroad. The V&S also operates a line in Colorado as the Towner Railway, which began serving a former Missouri Pacific Railroad line that had most recently been the Colorado, Kansas and Pacific Railway in 2005. Other railroads under common control with the V&S are the out-of-service Kern Valley Railroad in Colorado, the Gloster Southern Railroad in Louisiana and Mississippi, the Grenada Railway and Natchez Railway in Mississippi, a portion of the former Rock Island from St. Louis to Union, Missouri operated by the Missouri Central and the Southern Manitoba Railway in Manitoba.
Document 8: R.J. Corman Railroad Group: R.J. Corman Railroad Group, LLC is a privately owned railroad services and short line operating company headquartered in Nicholasville, KY, with field locations in 23 states. It was owned by Richard J. Corman, who established the company in 1973, and ran it until his death on August 23, 2013. The company owns eleven short-line railroads spanning Indiana, Kentucky, Mississippi, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, and West Virginia. The company serves all seven Class I railroads, many regional and short line railroads as well as various rail-served industries. These operations encompass an array of services, including: railroad construction, short line railroad operations, dispatch, industrial switching services, emergency response, track material logistics, distribution centers, signal design and construction, building eco-friendly locomotives, railroad worker training and an excursion dinner train.
Document 9: Norfolk Southern Railway: The Norfolk Southern Railway (reporting mark NS) is a Class I railroad in the United States. With headquarters in Norfolk, Virginia, the company operates 36,200 route miles in 22 eastern states, the District of Columbia, and has rights in Canada from Buffalo to Toronto and over the Albany to Montreal route. NS is responsible for maintaining 29,000 miles, with the remainder being operated under trackage rights from other parties responsible for maintenance. The common commodity hauled on the railroad is coal from mines in Indiana, Kentucky, Pennsylvania, Tennessee, Virginia, and West Virginia. The railroad also offers the largest intermodal network in eastern North America.
Document 10: Indiana and Ohio Railway: The Indiana and Ohio Railway (reporting mark IORY) is an American railroad that operates 570 mi of track in Ohio, southern Michigan, and parts of southeastern Indiana. It is owned and operated by Genesee & Wyoming, who acquired the railroad in the 2012 purchase of RailAmerica. The Indiana and Ohio Railroad (reporting mark INOH) (merged into the IORY in 1997) was formed in 1978 to operate a branch between Valley Junction, Ohio and Brookville, Indiana. The IORY's original line, acquired in 1985, connected Mason and Monroe, Ohio. The IORY set up a tourist operation known as the Indiana and Ohio Scenic Railway which operated over this line. The tourist train still operates out of Lebanon, Ohio under the ownership of the Cincinnati Railway Company (CRC) under the name Lebanon Mason Monroe Railroad. Another line, acquired in 1986, runs from Norwood to Brecon, Ohio. In 1991, the former DT&I between Washington Court House, Ohio and Springfield, Ohio came into the system via a designated operator agreement with the West Central Ohio Port Authority. The system expanded north into Michigan in 1997 when it acquired the remainder of the former DT&I mainline between Diann, Michigan and Springfield, Ohio. In 1994, it acquired two lines from Conrail in Springfield, Ohio: one between Springfield and Bellefontaine; and one between Springfield and Mechanicsburg. The Indiana and Ohio Central Railroad (reporting mark IOCR) was the designated owner of these two lines until 2004. One of the I&O's major events took place in 1996 when it was acquired by RailTex. In 2000 RailTex was absorbed by RailAmerica and in 2004 the I&O absorbed the Indiana and Ohio Central Railroad. Genesee & Wyoming acquired RailAmerica in December 2012.
Document 11: Pennsylvania Railroad: The Pennsylvania Railroad (reporting mark PRR) (or Pennsylvania Railroad Company and also known the "Pennsy") was an American Class I railroad that was established in 1846 and was headquartered in Philadelphia, Pennsylvania. It was called the Pennsylvania Railroad because it was established in the state of Pennsylvania.
Document 12: Carolina and Northwestern Railway: The Carolina & Northwestern Railway (Ca&NW) was a railroad that served South Carolina and North Carolina from 1897 until January 1, 1974. The original line was operated by the Ca&NW as a separate railroad controlled by the Southern Railway until 1974 when the name was changed to the Norfolk Southern Railway. On June 1, 1982, Southern Railway and Norfolk and Western Railroad merged to form Norfolk Southern Railway. Choosing to use the name 'Norfolk Southern Railway' for the merger, in 1981, the original Ca&NW line along with original Norfolk Southern Railway was renamed Carolina and Northwestern once again. In the early 1950s several shortline subsidiaries of the Southern Railway were leased to the Ca&NW for operation, with these lines remaining a part of the Ca&NW into the 1980s.
Document 13: Conrail: Conrail, the Consolidated Rail Corporation, (reporting mark CR) , was the primary Class I railroad in the Northeastern United States between 1976 and 1999, when its routes were split between the CSX Corporation and Norfolk Southern Railway. Conrail, a portmanteau of "consolidated" and "rail" from the name of the company, operates now as a joint-subsidiary for some limited functions.
Document 14: Northern Transcon: The Northern Transcon, a route operated by the BNSF Railway, traverses the most northerly route of any railroad in the western United States. This route was originally part of the Chicago, Burlington and Quincy Railroad, Northern Pacific Railway, Great Northern Railway and Spokane, Portland and Seattle Railway systems, merged into the Burlington Northern Railroad system in 1970.
Document 15: Lehigh and Susquehanna Railroad: The Lehigh and Susquehanna Railroad is a defunct railroad which operated in the state of Pennsylvania during the nineteenth and twentieth centuries. The company was a subsidiary of the Lehigh Coal and Navigation Company (LC&N), but for much of its lifetime leased by the Central Railroad of New Jersey. It was founded in 1837 to carry coal from the North Branch Division of the Pennsylvania Canal to the Lehigh Canal, but would later be extended to the Delaware River at Easton, Pennsylvania. It was conveyed to Conrail in 1976.
ground_truth: The JKWI was the designated operator of the Irvine, Warren, Kane & Johnsonburg Railroad, that was a partnership of Brock Railroad (a wholly owned subsidiary of Warren Car Company), Irvine Railroad (a wholly owned subsidiary of National Forge Company) and Struthers Wells Inter-American Corporation (a subsidiary of Struthers Wells), all three being Pennsylvania corporations, and had acquired from Conrail the following railroad line segments: MP 58.52 to MP 66.7 (Irvine to Warren) and MP 92.5 to MP 111.0 (Kane to Johnsonburg).