Question: In what city were business office an studios for KSGN located between 1958 to 2005?

Context paragraphs:
Sun.Star Superbalita Davao: Sun.Star Superbalita Davao is a Cebuano tabloid published daily by Sun.Star Davao Publishing, Inc. with editorial and business office at Granland Business and Warehouse Center, R. Castillo St., Agdao, Davao City.  The main product of Sun.Star Davao Publishing Inc. is the Sun.Star Davao, an English community newspaper circulated in Davao city.

G. Krug &amp; Son Ironworks and Museum: G. Krug & Son Ironworks is a historic iron works located at Baltimore, Maryland, United States.  It is a complex consisting of a two-story tall gable-roofed building dating from the first quarter of the 19th century, which houses the earliest shop; a four-story tall Victorian building which houses a business office on the first floor and storage rooms on the upper floors; and a three-story tall shed-roofed addition dating from 1870-1880.  It is in its fifth generation as a family business.

Gateway Playhouse: Gateway Playhouse is a summer theatre located on the eastern edge of Bellport, Long Island.  The street address is 215 South Country Road.  It's the oldest of three professional theatres on the island and nationally recognized as one of the top ten summer theatres in the nation.  Gateway Playhouse has been running for over sixty years.  The theatre grounds encompass the Mainstage Theatre, Barn Theatre (for acting school classes and projects), scene shop, two rehearsal studios, three dorm-style housing units, a newly remodeled kitchen, costume shop, design office/studio, paint shop, box office, business office, various storage spaces, a recreation room and a large hedge-lined lawn with outdoor swimming pool (which holds the distinction of being the first ever in-ground swimming pool on Long Island).  The Gateway Playhouse theatre seats 500 and its proscenium height is 34' holding 25 line sets for scenery and lights.

La Sierra University: La Sierra University (La Sierra or LSU) is a Seventh-day Adventist non-profit co-educational university located in Riverside, California, United States.  La Sierra offers undergraduate, graduate and doctoral level degrees and is accredited by the Western Association of Schools and Colleges (WASC) and the Adventist Accrediting Association (AAA).

KSGN: KSGN ("Keep Sharing the Good News") is a non-commercial based radio station located in Redlands, California, broadcasting to the Riverside, San Bernardino, Palm Springs, Banning areas of the Inland Empire on 89.7 FM and airs a Christian Contemporary music format.  It was first launched in 1958 as KPNF which was formed by three professors at La Sierra College (now La Sierra University) in Riverside.  The station has changed its call letters over the years.  Other call letters included KSDA, KLLU and finally KSGN.  The station's business office and studios were located on the campus of La Sierra University from 1958 to 2005.  In mid 2005 KSGN relocated its business office and studios to a location in Redlands just north of Interstate 10.

Radioactive, LLC: Radioactive, LLC is an Ohio limited liability company with extensive business interests in the commercial radio broadcasting industry.  It holds many FCC frequency allocation licenses won in FCC spectrum auctions.  The sole owner of Radioactive, LLC is Randy Michaels, former CEO of Clear Channel Communications and The Tribune Company.  The business office of record is located in Fort Wright, Kentucky.

WBBZ-TV: WBBZ-TV, virtual channel 67 (VHF digital channel 7), is a MeTV-affiliated television station serving Buffalo, New York, United States that is licensed to Springville.  The station is owned by ITV of Buffalo, a company controlled by former news photographer Philip A. Arno.  The station's business office and studios are located at the Eastern Hills Mall in the Town of Clarence, and its transmitter is located near Springville in the hills of southern Erie County.

Long Island Music Hall of Fame: The Long Island Music Hall of Fame is an American "hall of fame" organization, whose business office is located in Melville, New York.  It was incorporated in July 2005, under the New York State Board of Regents, as a nonprofit organization and holds a provisional charter to operate as a museum in the state of New York.  Expansion plans include a museum of Long Island music history, a multimedia resource center, an educational facility and outreach program, and will also serve as a venue for musical performances.

KRKR: KRKR (95.1 FM) is a radio station licensed to Waverly, Nebraska, United States.  The station serves the Lincoln and West Omaha areas.  The station is currently owned by My Bridge Radio.  Studios are located in Grand Island (though there is a business office east of downtown Lincoln), while its transmitter is located near Davey.

Cooper Chemical Company: Cooper Chemical Company has been in business since 1857.  The roots of the company were planted in the Iron Bound section (Clifford and Van Buren Streets) of Newark, New Jersey, by Charles Cooper and Jacob Kleinhans.  The company, originally called Charles Cooper & Co., developed chemicals, additives, paints, and other materials for industries in the United States and consumers.  The main business office was located on Worth Street near Chatham Square in New York City.

Supporting paragraphs: KSGN La Sierra University
Answer: Riverside, California