Question: Where are the main offices of the company whose locomotives pull the narrow gauge Emerson Zooline Railroad?

<P0-S0> The Denver, South Park, and Pacific Railroad (later called the Denver, Leadville and Gunnison Railway) was a historic narrow gauge railroad that operated in Colorado in the western United States in the late 19th century. <P0-S1>  The railroad opened up the first rail routes to a large section of the central Colorado mining district in the decades of the mineral boom. <P0-S2>  The railroad took its name from the fact that its main line from Denver ascended the Platte Canyon and traversed South Park. <P0-S3>  Founded in 1872 by Colorado Governor John Evans, the company was purchased by the Union Pacific Railway in 1880, though it continued to be operated independently. <P0-S4>  The line went bankrupt in 1889 and was reorganized under the new moniker the Denver, Leadville and Gunnison Railway. <P0-S5>  When the Union Pacific went bankrupt in 1893, the DL&G lines went into receivership and were eventually sold to the Colorado and Southern Railway. <P0-S6>  In the first half of the 20th century, nearly all the company's original lines were dismantled or converted into . <P0-S7>  The last train to run the old DSP&P tracks was from Como, Colorado on April 11, 1937. <P0-S8>  A section of the standard gauge line between Leadville and Climax is still operated as a passenger excursion railroad called the Leadville, Colorado and Southern Railroad. <P0-S9>  At its peak the Denver, South Park and Pacific Railroad had 335 mi of narrow gauge line, making it the largest narrow gauge railroad in the state of Colorado. <SEP> <P1-S0> The Saint Louis Zoological Park, commonly known as the Saint Louis Zoo, is a zoo in Forest Park in St. Louis, Missouri, United States. <P1-S1>  It is recognized as a leading zoo in animal management, research, conservation, and education. <P1-S2>  The zoo is accredited by the Association of Zoos and Aquariums (AZA). <P1-S3>  Admission is free based on a public subsidy from a cultural tax district, the Metropolitan Zoological Park and Museum District (ZMD); fees are charged for some special attractions. <P1-S4>  A special feature is the narrow gauge Emerson Zooline Railroad with passenger trains pulled by Chance Rides C.P. Huntington locomotives that encircle the zoo, stopping at the more popular attractions. <SEP> <P2-S0> Denver & Rio Grande Western K-28 is a class of ten narrow gauge 2-8-2, Mikado type, steam railway locomotives, built as Passenger locomotives in 1923 by the Schenectady Locomotive Works of the American Locomotive Company for the Denver & Rio Grande Railroad. <P2-S1>  They were the first new narrow gauge locomotives ordered by the railroad since 1903. <P2-S2>  They initially comprised class E-4-148-S, but were reclassified K-28 in 1924 when the railroad reorganized into the Denver & Rio Grande Western Railroad. <SEP> <P3-S0> Chance Rides Manufacturing is a roller coaster and amusement ride manufacturer. <P3-S1>  The company was formed on May 16, 2002, when the former Chance Industries Inc. emerged from bankruptcy. <P3-S2>  The main office and manufacturing facility are located in Wichita, Kansas.