Question: The 1972 Baylor Bears defeated Texas A&M by a score of 15-13 in the rivalry that debuted in what year?

Context paragraphs:
1981 Baylor Bears football team: The 1981 Baylor Bears football team represented Baylor University in the 1981 NCAA Division I-A football season.  The Bears finished the season sixth in the Southwest Conference.  In the Battle of the Brazos, the Bears beat Texas A&M for the fourth consecutive season.  It was the longest winning streak the Bears had in the rivalry.

List of Baylor Bears head football coaches: The Baylor Bears football program is a college football team that represents Baylor University in the Big 12 Conference in the National Collegiate Athletic Association.  The team has had 25 head coaches since it started playing organized football in 1899.  Baylor was a charter member of the Southwest Conference (SWC), joining in 1915.  They later became a charter member of the Big 12 in 1996 when the SWC disbanded.  After playing without a nickname for 15 years, the school chose "Bears" as the team nickname in 1914.  There were three seasons where Baylor did not field a team.  In 1906, the university banned football due to the violent nature of the sport.  However, student protests persuaded school officials to reinstate it the next year.  In 1943 and 1944, the school cancelled the football program due to World War II.  The Bears have played in 1,099 games during their 108 seasons.  In those seasons, seven coaches have led Baylor to postseason bowl games: Bob Woodruff, George Sauer, Sam Boyd, John D. Bridgers, Grant Teaff, Chuck Reedy, and Art Briles.  Five coaches have won conference championships with the Bears: Charles P. Mosley, Frank Bridges, Teaff, Reedy and Briles.

1972 Baylor Bears football team: The 1972 Baylor Bears football team represented the Baylor University in the 1972 college football season.  Grant Teaff was hired to resurrect the moribund football team at Baylor.  Baylor originally hired Rudy Feldman from New Mexico, but Feldman quit after one day, leaving the job to Teaff.  Baylor had been 7–43–1 in the five seasons preceding Teaff's arrival.  The Bears offense scored 180 points, while the Bears defense allowed 156 points.  In the Battle of the Brazos, the Bears beat Texas A&M by a score of 15–13.

Knoxville Ice Bears: The Knoxville Ice Bears are a professional ice hockey team.  The team competes in the Southern Professional Hockey League.  They play their home games at the Knoxville Civic Auditorium and Coliseum in Knoxville, Tennessee.  The Ice Bears are coached by Mike Craigen, currently in his 5th season as head coach.  The Ice Bears have made the playoffs in all 14 years of their existence.  In 2006, the Ice Bears defeated the Florida Seals to take their first President's Cup.  The Ice Bears won back to back President's Cup Championships in the 2007-08 and 2008-09 seasons.  On April 18, 2015, the Ice Bears defeated the Mississippi RiverKings 4-2 to sweep the 2015 SPHL Finals and win their 4th President's Cup.

Battle of the Brazos: The Battle of the Brazos was the official collegiate sports rivalry between the Baylor Bears and Texas A&M Aggies.  The rivalry is named for the Brazos River that flows by the two schools, which are only 90 miles apart.  The Battle of the Brazos debuted in 1899.  The rivalry officially folded in 2012, when Texas A&M left the Big 12 to join the Southeastern Conference.

1974 Baylor Bears football team: The 1974 Baylor Bears football team represented the Baylor University in the 1974 NCAA Division I football season.  Baylor won eight games and captured the Southwest Conference (SWC) championship for the first time since 1924, and in the process defeated the Texas by a score of 34–24 after rallying from a 24–7 halftime deficit.  It was Baylor's first victory over the Longhorns in 17 years.  The 1974 season and the win over Texas are commonly referred to as the "Miracle on the Brazos" (after the Brazos River, which runs near the Baylor campus) and it remains part of Baylor lore.

1899 Baylor football team: The 1899 Baylor Bears football team represented Baylor University in the 1899 college football season.  This was the first football season for Baylor.  They all four games at home games in Waco, Texas.  They were coached by head coach R. H. Hamilton.  Initially, Baylor played its home games on an undetermined field near the university.  Baylor played its first game against Texas A&M, which would become a rivalry, the Battle of the Brazos, with over 100 games played in the series by 2003.

Baylor–Texas Tech football rivalry: The Baylor–Texas Tech football rivalry is an American college football rivalry between the Baylor Bears and Texas Tech Red Raiders.  Each school is a member of the Big 12 Conference.  The rivalry began in 1929.  The game has been played every year since 1956 despite the fact that Texas Tech was a member of the Border Intercollegiate Athletic Conference.  In 1960, Texas Tech joined the Southwest Conference, ensuring the rivalry would continue.  In 1996, the Southwest Conference dissolved, and both teams were invited, along with the Texas Longhorns and Texas A&M Aggies, with former members of the Big Eight Conference to form the Big 12 Conference.  From 1947–64, Baylor won 14 of the 15 games.  From 1996–2010, Texas Tech won 15 straight games.  In the most recent meeting of the two teams, Texas Tech snapped Baylor's 5 game win streak to bring the series record to a tie.

1989 Baylor Bears football team: The 1989 Baylor Bears football team represented the Baylor University in the 1989 NCAA Division I-A football season.  The Bears finished the season fourth in the Southwest Conference.  In the season's final game, Baylor defeated Texas by the score of 50 to 7.  It was Baylor's seventh victory in Austin and the first there since 1951.

2015–16 Baylor Bears basketball team: The 2015–16 Baylor Bears basketball team represented Baylor University in the 2015–16 NCAA Division I men's basketball season.  This was head coach Scott Drew's thirteenth season at Baylor.  The Bears competed in the Big 12 Conference and played their home games at the Ferrell Center.  They finished the season 22–12, 10–8 in Big 12 play to finish in a tie for fifth place.  They defeated Texas in the quarterfinal of the Big 12 Tournament to advance to the semifinals where they lost to Kansas.  They received an at-large bid to the NCAA Tournament where they lost in the first round to Yale.

Supporting paragraphs: 1972 Baylor Bears football team Battle of the Brazos
Answer: 1899