NBC Sports coverage of the 2018 Winter Olympics (the broadcasts being officially titled, as were the games themselves, The 23rd Olympic Winter Games) will be broadcast from February 9 to February 25, 2018 on the various television networks of NBC Universal in the United States.
 Coverage will be broadcast on NBC, NBCSN, CNBC, MSNBC, USA Network, Telemundo, NBC Universo, Olympic Channel, the NBC Sports app, and NBCOlympics.com.
Will & Grace is an American sitcom created by Max Mutchnick and David Kohan.
 Set in New York City, the show focuses on the relationship between best friends Will Truman (Eric McCormack), a gay lawyer, and Grace Adler (Debra Messing), a straight interior designer.
 The show was broadcast on NBC from September 21, 1998 to May 18, 2006, for a total of eight seasons, and re-started its run on NBC on September 28, 2017.
 During its original run, "Will & Grace" was one of the most successful television series with gay principal characters.
The Marriage is an American sitcom that aired on NBC from July to August 1954.
 The series is noted as the first prime-time network television series to be broadcast regularly in color.
 Broadcast live by NBC for seven episodes in the summer of 1954, the series stars real-life couple Hume Cronyn (who also produced the show) and Jessica Tandy as a New York lawyer and his wife with two children, played by Susan Strasberg and Malcolm Brodrick.
William "Will" Truman is a fictional character on the American sitcom "Will & Grace", portrayed by Eric McCormack.
 He is a lawyer who lives in the Upper West Side of New York City with his best friend, Grace Adler.
 The series also portrays his relationship with the two other main characters, Karen Walker (Megan Mullally) and Jack McFarland (Sean Hayes).
NBC Sunday Night Football is a weekly television broadcast of National Football League (NFL) games on NBC in the United States.
 It began airing on August 6, 2006 with the Pro Football Hall of Fame Game, which opened that year's preseason.
 NBC took over the rights to the Sunday prime time game telecasts from ESPN, which carried the broadcasts from 1987 to 2005 (concurrently with NBC assuming the rights to Sunday evening regular-season games, ESPN took over the broadcast rights to "Monday Night Football" from sister network ABC beginning with the 2006 season).
 Previously, NBC had aired American Football League (AFL), and later American Football Conference (AFC), games from 1960 until 1998, when CBS took over those rights.
Norby is an American sitcom television series that aired from January 5 until April 6, 1955 on NBC.
 This was one of the first regular weekly series broadcast by NBC in its new all-electronic compatible color system, which had been approved by the FCC in 1953.
 "Norby" starred veteran film actor David Wayne, and was created by writer David Swift, then best known as the creator of the popular sitcom "Mister Peepers".
 Eastman Kodak was the program's sponsor, and it was filmed in Eastmancolor.
 The series ended when Kodak pulled its sponsorship due to the high costs of filming "Norby" in color.
Notre Dame Football on NBC is a presentation of college football games involving the Notre Dame Fighting Irish that are produced by NBC Sports, the sports division of the NBC television network in the United States.
 NBC has broadcast all Notre Dame home games since September 7, 1991, with two games so far broadcast live on NBC Sports's sports cable channel, NBCSN.
IndyCar Countdown (Formerly IndyCar Central), is an American television programme dedicated to the coverage of Indy Car racing and is broadcast by the American broadcaster NBC from 2012 onwards.
 It is a live on-site pre-race show for all Indycar races televised on NBC Sports Network and CNBC.
 It was initially broadcast on Versus from 2009-2011 before it was renamed as NBC Sports network and it resulted in NBC getting broadcast rights to IndyCar races in 2012.
NBC Sports coverage of the 2008 Summer Olympics (the broadcasts being officially titled, as were the games themselves, "The Games of the XXIX Olympiad") was broadcast from August 6 to August 24, 2008 (including selecting football matches prior to the opening ceremonies) on the various television networks of NBC Universal in the United States.
 Coverage was broadcast on NBC, Telemundo, USA Network, CNBC, MSNBC, Oxygen, their associated HDTV simulcast channels where applicable, and Universal HD.
 NBC also set up two dedicated cable channels, the NBC Olympic Soccer Channel and the NBC Olympic Basketball Channel, for the express purpose of providing additional coverage of those two sports.
NBC Sports coverage of the 2016 Summer Olympics (the broadcasts being officially titled, as were the games themselves, The Games of the XXXI Olympiad) was broadcast from August 3 to August 21, 2016 on the various television networks of NBC Universal in the United States.
 Coverage was broadcast on NBC, NBCSN, Bravo, CNBC, Golf Channel, MSNBC, USA Network, Telemundo, NBC Universo, the NBC Sports app, and NBCOlympics.com.
 NBC once again set up two dedicated cable channels, the NBC Olympic Soccer Channel and the NBC Olympic Basketball Channel, for the express purpose of providing additional coverage of those two sports.
 NBC had a record 170 commentators covering the Rio Olympics, in Brazil and from the NBC Sports headquarters in Stamford, CT.

Question: When did the sitcom that Will Truman stared in broadcast on NBC?
Answer: September 21, 1998