Question: Which television market does the station, for which Don Shelby was most recently a news anchor, serve?

Context paragraphs:
Stan Atkinson: Stan Atkinson was a television news reporter and anchor for over 45 years, mostly in the Sacramento area, including many years as principal news anchor for KCRA, Channel 3, in Sacramento.  and then principal news anchor for KOVR from 1994 until his retirement in 1999.  He is considered one of the most popular news figures in Sacramento, the nation's 19th-largest television market, for more than 20 years. " The Sacramento Bee" called him "The Man Who Owns Sacramento."

Robbie Timmons: Robbie Timmons is an award winning TV News Anchor/reporter for Detroit television stations, WJBK-TV and WXYZ-TV.  She was the first female news anchor in American history to anchor the 6:00pm and 11:00pm broadcasts in March, 1973 while anchoring the news at WILX-TV in Lansing, Michigan.  After 4 years at WILX-TV in Lansing, she was offered a job working as a reporter and 11pm news anchor for WJBK-TV (CBS) in Detroit, where she worked for 6 years.  In 1982 Timmons accepted a news anchor position for WXYZ-TV, the ABC affiliate in Detroit where she received numerous honors including Emmy Awards and the distinction of being named one of the most powerful women in Michigan.  Robbie Timmons retired in October, 2010 and is currently an officer of a non-profit Thoroughbred retraining organization, CANTER.  www.canterusa.org

Don Shelby: Donald Gilbert Shelby (born May 27, 1947) is a retired American journalist who was most recently a news anchor on WCCO-TV in Minneapolis, Minnesota.  He is regarded as an experienced investigative journalist, as his work has earned two Peabody awards and an Emmy Award.

WCCO-TV: WCCO-TV, virtual channel 4 (UHF digital channel 32), is a CBS owned-and-operated television station, licensed to Minneapolis, Minnesota, United States and serving the Twin Cities television market.  The station is owned by the CBS Television Stations subsidiary of CBS Corporation.  WCCO-TV's studios are located on South 11th Street in downtown Minneapolis, and its transmitter is located at the Telefarm complex in Shoreview, Minnesota.

Ron Steele (news anchor): Ron Steele is an American local news anchor at KWWL in Waterloo, Iowa.  He has been at KWWL since 1974, where he started as the sports director and is Iowa's longest sitting anchor.  KWWL-TV is the NBC affiliate for the Cedar Rapids/Waterloo/Iowa City/Dubuque television market.

Debby Knox: Debby Knox is a longtime news anchor at WISH-TV and WTTV in Indianapolis, Indiana.  She joined the station as a noon news anchor in 1980 and was a longtime co-anchor with Mike Ahern on the station's evening newscasts.  She announced her retirement in 2013.  On January 1, 2015; Debby came out of retirement to co-anchor the new CBS affiliate WTTV's new evening newscasts from 5:00-6:30 and 11:00 p.m. with longtime WXIN news anchor Bob Donaldson.

Clarice Tinsley: Clarice Tinsley (born December 31, 1954) is an American broadcast journalist.  In November 1978, she moved to the Dallas–Fort Worth metroplex to anchor the ten o'clock news for KDFW-TV (the CBS station for the market at the time, now a Fox O&O).  In 1979 the six o'clock news was added to her duties.  As of 2012, she is the longest-serving news anchor in the Dallas/Fort Worth television market.

Ed Hughes (anchor): Edward F. Hughes (March 30, 1938 – June 1, 2004) was a former news anchor best known for his longtime role as a news anchor for Norfolk, Virginia CBS affiliate WTKR from 1967 (when the station was known as WTAR) until shortly before his death in 2004.  In addition, he was also the morning news anchor at radio station Z-104 for a time during the 1980s.

Jeff Hullinger: Jeff Hullinger is a 19 time-Emmy Award-winning news and sports anchor from Atlanta.  He has also been inducted into the Southeast Chapter of the National Academy of Television Arts & Sciences Silver Circle.  Jeff is now with WXIA TV NBC Atlanta serving as 5, 6,10,11pm weeknight news anchor/weeknight sports anchor.  He has worked as the morning drive news anchor on B98.5 WSB-FM, and the afternoon drive news anchor on News/Talk 750 WSB Radio.  His career includes anchoring WAGA TV, being a host for CNN’s "TalkBack Live", calling games for ESPN and doing play-by-play for the Atlanta Falcons.

Dick Nourse: Dick Nourse is a retired award-winning Salt Lake City, Utah television news anchor.  He most recently worked for KSL 5 Television.  Nourse joined the KSL news team in 1964 as the station's weekend anchor/reporter.  Six months later, he was named the station's weekday anchor.  He concluded his 43-year career with his final newscast on November 28, 2007, a record term for a Utah television news anchor.  Nourse's longevity as an American news anchor comes second to that of the late Hal Fishman, whose career spanned 47 years.

Supporting paragraphs: Don Shelby WCCO-TV
Answer: Twin Cities