Question: At which period the studio operated independently which was owned by Australian company Melbourne House?

Context paragraphs:
KEXP-FM: KEXP-FM (90.3 FM) is a public radio station based in Seattle, Washington, that specializes in alternative and indie rock programmed by its disc jockeys. Its broadcasting license is owned by Friends of KEXP, an independent 501(c)(3) organization.  The station operated under the call letters KCMU until 2001, when a partnership was formed between Paul Allen's Experience Music Project and KEXP, which provided the station with significant funding through 2005.  Since then, KEXP has operated independently by Friends of KEXP.

Mission Raceway Park: Mission Raceway Park, also known as MRP, is an auto racing facility located in Mission, British Columbia, Canada.  The facility features a ¼ mile NHRA-sanctioned dragstrip, a 2 km 9-turn road course, and a 3 km motocross track.  It is owned and operated by the B.C. Custom Car Association, and the BCCCA operates the drag strip directly.  The road course and motocross tracks are operated independently by the Sports Car Club of British Columbia (SCCBC) and the Lower Mainland Motocross Club (LMMC) respectively.

Krome Studios Melbourne: Krome Studios Melbourne, originally Beam Software, was an Australian video game development studio founded in 1977 by Alfred Milgrom and Naomi Besen and based in Melbourne, Australia.  The studio operated independently from 1988 until 2000, when it was acquired by Infogrames, who changed the name to Melbourne House.  In 2006 the studio was sold to Krome Studios.

South Australian Company: The South Australian Company was formed in London on 9 October 1835 by George Fife Angas and other wealthy British merchants to develop a new settlement in South Australia; its purpose was to build a new colony.  The South Australian Company ended business in its own right on 17 March 1949 when it was liquidated Elders Trustee & Executor Company Ltd, which had been managing its Australian affairs since the death of the last Colonial Manager, Arthur Muller in 1936.

Buffalo and Susquehanna Railroad: The Buffalo and Susquehanna Railroad was a railroad company that formerly operated in western and north central Pennsylvania and western New York states.  It was created in 1893 by the merger and consolidation of several smaller logging railroads.  It operated independently until 1929, when a majority of its capital stock was purchased by the Baltimore and Ohio Railroad.  At the same time, the B&O also purchased control of the neighboring Buffalo, Rochester, and Pittsburgh Railway.  The Baltimore and Ohio officially took over operations of both roads in 1932.

Denver, South Park and Pacific Railroad: 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.  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.  The railroad took its name from the fact that its main line from Denver ascended the Platte Canyon and traversed South Park.  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.  The line went bankrupt in 1889 and was reorganized under the new moniker the Denver, Leadville and Gunnison Railway.  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.  In the first half of the 20th century, nearly all the company's original lines were dismantled or converted into .  The last train to run the old DSP&P tracks was from Como, Colorado on April 11, 1937.  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.  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.

Gyroscope (video game): Gyroscope is an action video game published by Melbourne House in 1985 for a number of home computers.  It is based on the Atari arcade game "Marble Madness".  In fact, Melbourne House would go on to publish the official Atari ports of "Marble Madness" ("DeLuxe Edition") for the ZX Spectrum and Amstrad CPC but these were entirely new versions, unconnected to "Gyroscope" (being coded by John F. Cain rather than the Catalyst Coders).

Genie (Terex): Genie is an American company owned by Terex which manufactures work lifts and platforms used in construction, maintenance, warehouse stocking, and equipment installation.  Founded in 1966 by Bud Bushnell, the company operated independently until acquired by Terex in 2002.  Genie operates in locations worldwide, headquartered in Redmond, Washington, United States.  The company marked its 50th anniversary in 2016.

Kirkwood Public Library: Kirkwood Public Library (KPL) primarily serves residents of the city of Kirkwood, Missouri, USA.  The library is operated independently, and is a part of the Municipal Library Consortium of St. Louis County (MLC), which connects it to 8 other independently operated libraries in neighboring St. Louis County municipalities.  KPL is one of the largest libraries in the consortium rivaling the University City Public Library.  It is a member of the Downtown Special Business District and the Kirkwood Des Peres Area Chamber of Commerce.  In 1930, the Kirkwood Public Library helped to open the Ferguson Municipal Public Library by donating its initial first books.

War in Middle Earth: War in Middle Earth is a real-time strategy game released for the ZX Spectrum, MSX, Commodore 64, Amstrad CPC, MS-DOS, Commodore Amiga, Apple IIGS, and Atari ST in 1988 by Australian company Melbourne House.

Supporting paragraphs: War in Middle Earth Krome Studios Melbourne
Answer: 1988 until 2000