Question: What conference did William Alexander "Bill" Curry's team join after their last year as competing as football independents?

Context paragraphs:
Herb Sies: Dale Hubert "Herb" Sies (January 2, 1893 – October 17, 1954) was an American football player and coach.  He was born on January 2, 1893 in Ames, Iowa and attended Davenport High School.  He enrolled at the University of Pittsburgh, where he played football as a guard.  Sies was named a consensus All-American in 1917.  Seis played five seasons in the National Football League (NFL) and its predecessor, the American Professional Football Association.  Sies began his professional playing career with the Cleveland Tigers in 1920 for whom he started one game.  The following season, he played for the Dayton Triangles as a right guard.  That season, he started in nine games, and the following year, he started in eight games.  In 1923, he both played for and served as the head coach for the Rock Island Independents.  Sies coached his team to an 8–2–3 record to finish 12th in the league.  He started in eight games for the Independents and made good three field goals and eight extra point attempts.  That season, "Collyer's Eye" magazine named Sies to its All-NFL second team.  In 1924, he returned to Dayton for his final season.  He made one field goal attempt for the Triangles.

2004 UCF Golden Knights football team: The 2004 UCF Golden Knights football team represented the University of Central Florida in the 2004 NCAA Division I-A football season.  Their head coach was George O'Leary, in his first season with the team.  It was their last year in the Mid-American Conference, in the East Division.  The Golden Knights would join Conference USA for the 2005 season.

Big Blue River Conference: The Big Blue River Conference was an IHSAA-mandated conference featuring schools from North Central and East Central Indiana.  It operated from the 1968-69 school year until 1988-89.  Five of the original seven schools came from the East Central Conference, four directly, while Tri was formed from the consolidation of ECC member Spiceland.  Morton Memorial, the last remaining ECC member in 1969, would join the conference that year, along with Hamilton Southeastern.  The nine school format did not last long, as Morton Memorial left after one season, and Hamilton Southeastern had outgrown the conference and left by 1972.  The conference briefly returned to nine schools in 1977, as Lapel and Shenandoah joined from the folding White River Conference.  However, North Decatur left three years later, as the new expansion left them geographically isolated.  Morristown would follow suit in 1985, as the school dropped football.  The conference would split in 1989, as Lapel and Shenandoah would help reform the WRC, New Palestine and Triton Central would move to the Rangeline Conference, and Tri was accepted into the Tri-Eastern Conference.  Knightstown and Eastern Hancock were left as independents, though both would join the WRC six and eight years later, respectively.

1928 Georgia Tech Golden Tornado football team: The 1928 Georgia Tech Golden Tornado football team represented the Georgia Institute of Technology (commonly known as Georgia Tech) during the 1928 Southern Conference football season.  The team, which was a member of the Southern Conference (SoCon), was coached by William Alexander in his ninth year as head coach.  Alexander compiled a record of 10–0 (7–0 SoCon) and outscored his opponents 213 to 40.  Georgia Tech played its home games at Grant Field.

1927 Georgia Tech Golden Tornado football team: The 1927 Georgia Tech Golden Tornado football team represented the Georgia Tech Golden Tornado of the Georgia Institute of Technology during the 1927 Southern Conference football season.  A member of the Southern Conference (SoCon), Georgia Tech was coached by William Alexander in his 8th year as head coach, compiling a record of 8–1–1 (7–0–1 SoCon) and outscoring opponents 125 to 39.  Georgia Tech played its home games at Grant Field.

1966 Kansas State Wildcats football team: The 1966 Kansas State Wildcats football team represented Kansas State University in the 1966 college football season.  The team's head football coach was Doug Weaver.  It was the last year at the helm of the Wildcats for Doug Weaver.  The Wildcats played their home games in Memorial Stadium for the second to last year.  The Wildcats finished the season with a 0–9–1 record with a 0–6–1 record in conference play.  They finished in a tie for seventh place.  The Wildcats scored 66 points and gave up 226 points.

1982 Georgia Tech Yellow Jackets football team: The 1982 Georgia Tech Yellow Jackets football team represented the Georgia Institute of Technology during the 1982 NCAA Division I-A football season.  The Yellow Jackets were led by third-year head coach Bill Curry, and played their home games at Grant Field in Atlanta, Georgia.  It was their last year competing as football independents before joining the Atlantic Coast Conference in 1983.

Bill Curry: William Alexander "Bill" Curry (born October 21, 1942) is a retired American football coach and former player.

2012 SMU Mustangs football team: The 2012 SMU Mustangs football team represented Southern Methodist University in the 2012 NCAA Division I FBS football season as members of Conference USA in the West Division.  June Jones led the Mustangs in his fifth season.  The Mustangs played home games in University Park, Texas (an enclave of Dallas, Texas) at Gerald J. Ford Stadium.  This was SMU's last year as a member of Conference USA as they will join the Big East Conference in 2013.  They finished the season 7–6, 5–3 in C-USA play to finish in second place in the West Division.  They were invited to the Hawaii Bowl where they defeated Fresno State.

Pittsburgh–Syracuse football rivalry: The Pittsburgh–Syracuse football rivalry is an American college football rivalry between the Pittsburgh Panthers and Syracuse Orange.  It began in 1916 and has been played every year since 1955.  The Panthers and Orange were both Eastern football independents for most of their history but have shared the same football conference since 1991 when the Big East Football Conference was formed from Eastern football independents.  Pitt is tied as the most played opponent for Syracuse and Syracuse is the third most played opponent for Pitt.  Sharing membership in the Atlantic Coast Conference (ACC) since 2013, the Panthers and Orange have since played 72 times.  Pittsburgh leads the series 38–31–3.

Supporting paragraphs: 1982 Georgia Tech Yellow Jackets football team Bill Curry
Answer: Atlantic Coast Conference