Question: Sir Baboon McGoon was one of 13 bombers which was introduced in what year?

Context paragraphs:
2014 Salina Bombers season: The 2014 Salina Bombers season was the team's second season as a professional indoor football franchise and second as a member of the Champions Professional Indoor Football League.  One of nine teams in the CPIFL for the league's final season, the Salina Bombers were owned by Chris Vercher.  The Bombers played their home games at the Bicentennial Center in Salina, Kansas, under the direction of three head coaches in 2014.  Coach Bob Frey began the year before stepping down and was succeeded by Eric Clayton.  Clayton resigned and was replaced by Bob Ray.

D. C. Wilcutt: D. C. "Dixie" Wilcutt (March 25, 1923 – October 19, 2015) was an American professional basketball player.  Wilcutt was selected in the 1948 BAA Draft by the St. Louis Bombers.  He played for the Bombers for two seasons.  The first year they were in the Basketball Association of America.  That league then combined with the National Basketball League to form the modern day National Basketball Association, which Wilcutt then played in for one season before retiring from basketball.

DoYaThing: "DoYaThing" is a song by alternative rock virtual band Gorillaz, featuring LCD Soundsystem frontman James Murphy and André 3000 of Outkast.  The song was released on 23 February 2012.  It was commissioned by Converse as a part of their "Three Artists.  One Song" project where three artists collaborate on a track.  The song is also the starting point for a limited edition Chuck Taylor All-Stars collection designed by Gorillaz artist Jamie Hewlett.  The shoe designs feature artwork from other projects related to Gorillaz.  It was released in two different versions: the approximately 4-and-a-half-minute radio edit, and the explicit 13-minute version.  The former was released as a free download on Converse's website, while the latter was released for streaming on Gorillaz's website.  The cover features a baboon representing Murphy and a masked figure representing André 3000, referencing the single cover for "I'm a Goner" by Matt and Kim.

Boeing B-17 Flying Fortress: The Boeing B-17 Flying Fortress is a four-engine heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC).  Competing against Douglas and Martin for a contract to build 200 bombers, the Boeing entry (prototype Model 299/XB-17) outperformed both competitors and exceeded the air corps' performance specifications.  Although Boeing lost the contract (to the Douglas B-18 Bolo) because the prototype crashed, the air corps ordered 13 more B-17s for further evaluation.  From its introduction in 1938, the B-17 Flying Fortress evolved through numerous design advances, becoming the third-most produced bomber of all time, behind the B-24 and the multirole Ju 88.

Mike Richardson (running back, born 1969): Michael Richardson (born October 13, 1969) is a former Canadian football player.  He attended Louisiana Tech in 1987 until 1991.  In 1990, he was named Most Valuable Player in the Independence Bowl.  A year later, he was signed as a free agent with the New York Giants.  In 1992, he was signed by the Winnipeg Blue Bombers and quickly became a star in the Canadian Football League.  Michael Richardson was an exceptional running back who played five seasons with the CFL for two different teams.  In 1992, his first year with the Winnipeg Blue Bombers he rushed for 1,100 yards in only 11 games, and had one of the best playoff performances in history with 27 carries for 227 yards and two touchdowns.  He was named Rookie of the Year that season.  Michael Richardson also was named CFL Player of the week five times in 1992 and was a huge contributor to helping his team get to the Grey Cup that year.

Fritz Hanson: Melvin "Fritz" Hanson (July 13, 1914 – February 14, 1996) was a Canadian football player for the Winnipeg Blue Bombers and the Calgary Stampeders.  Hanson was signed by the Blue Bombers for $125 a game and free room and board, which was a considerable sum in the cash-strapped dirty thirties.  Nicknamed the 'Galloping Ghost', 'Twinkle Toes', and the 'Perham Flash', Hanson was one of the pioneers of football in Western Canada and a huge star at the time.  Although he weighed only 145 lb he used his incredible quickness to evade defenders.  He helped lead the Blue Bombers to the first Grey Cup victory by a western Canadian team in 1935 and won again with the Bombers in 1939 and 1941.  In the 1935 Grey Cup Game Hanson had an incredible 334 punt return yards on 13 returns, a record that still stands today, including a sensational 78-yard return for the winning touchdown.  He played with Winnipeg from 1935 through 1946 then spent two years playing for the Calgary Stampeders, where he won a fourth Grey Cup in 1948.

1988 Hamilton Tiger-Cats season: The 1988 Hamilton Tiger-Cats season was the 31st season for the team in the Canadian Football League and their 39th overall.  The Tiger-Cats finished in 3rd place in the East division with a 9–9–0 record and lost the East Semi-Final to the Winnipeg Blue Bombers.  Earl Winfield tied Steve Stapler’s record for most touchdowns in one season with 13 (which Tony Champion broke the year later).  It would be Stapler’s final season with the Tiger-Cats, and he finished ranked fourth all-time in franchise history in touchdowns.  Paul Osbaldiston would set a franchise record (which he would break on three separate occasions) for the most converts in one season with 49 made.

Sir Baboon McGoon: Sir Baboon McGoon was an American Boeing B-17 Flying Fortress, a Douglas-Long Beach built B-17F-75-DL, ASN 42-3506, last assigned to the 324th Bombardment Squadron, 91st Bomb Group, 8th Air Force, operating out of RAF Bassingbourn (AAF Station 121), Cambridgeshire, England.  Its nose art and name were based on the male character Baboon McGoon from Al Capp's comic strip, "Li'l Abner".

James Enstone: Captain Albert James Enstone {'1': ", '2': ", '3': ", '4': "} (29 August 1895 – 4 October 1963) was a British World War I flying ace.  Various sources credit him with differing air victory scores.  In one text, he is credited with 13 confirmed aerial victories and driving down 11 other German aircraft, including three Gotha bombers.  Another source claims 15 confirmed aerial victories; ten (including one shared win) were destroyed, and five (including one shared win) were driven down out of control.  He is known to have attacked two Gotha bombers.  Regardless of his actual victory totals, records show that Enstone served his country valiantly.

2015 Winnipeg Blue Bombers season: The 2015 Winnipeg Blue Bombers season was the 58th season for the team in the Canadian Football League and their 83rd overall.  The Blue Bombers finished the season in 4th place in the West Division with a 5–13 record and missed the playoffs for the fourth year in a row, as well as the sixth time in seven seasons.  This was also the first time since 2010 that a Grey Cup host city has failed to qualify for the playoffs.

Supporting paragraphs: Sir Baboon McGoon Boeing B-17 Flying Fortress
Answer: 1938