Question: What number uniform did the standby official wear in the Super Bowl game played at Pro Player Stadium in Miami between the Denver Broncos and Atlanta Falcons?

Context paragraphs:
1999 MicronPC Bowl: The 1999 MicronPC.com Bowl was a post-season American college football bowl game at Pro Player Stadium in Miami Gardens, Florida between the University of Illinois Fighting Illini and the University of Virginia on December 30, 1999.  The game was the final contest of the 1999 NCAA Division I-A football season for both teams, and ended in a 63–21 victory for Illinois.  Illinois and Virginia previously met in post-season at the 1990 Florida Citrus Bowl, in which Illinois beat Virginia, 31-21.  This was the 2nd MicronPC Bowl and tenth overall held at Pro Player Stadium.  The following year would add . com to the bowl name.

2004 Orange Bowl: The 2004 FedEx Orange Bowl game was a post-season college football bowl game between the Miami Hurricanes and the Florida State Seminoles on January 1, 2004, at Pro Player Stadium in Miami Gardens, Florida.  Miami defeated FSU 16–14 in a stout defensive battle.  The game was part of the 2003–2004 Bowl Championship Series (BCS) of the 2003 NCAA Division I-A football season and represented the concluding game of the season for both teams.  The Orange Bowl was first played in 1935, and the 2004 game represented the 70th edition of the Orange Bowl.  The contest was televised in the United States on ABC.

Chad Brown (American football official): Chadwick Curtis "Chad" Brown Jr. (September 9, 1947 – September 9, 2016) was a National Football League official who officiated from 1992 through 2014.  Brown served as an umpire and officiated in two Super Bowls (2001 and 2011) and served as an alternate (standby) official for Super Bowl XXXIII in 1999.  He wore uniform number 31.

2003 Orange Bowl: The 2003 FedEx Orange Bowl game was a post-season college football bowl game between the Iowa Hawkeyes and the USC Trojans on January 2, 2003, at Pro Player Stadium in Miami Gardens, Florida.  USC won the game, 38–17.  The game was part of the 2002–2003 Bowl Championship Series (BCS) of the 2002 NCAA Division I-A football season and represented the concluding game of the season for both teams.  The Orange Bowl was first played in 1935, and the 2003 game represented the 69th edition of the Orange Bowl.  The contest was televised in the United States on ABC.

1999 Denver Broncos season: The 1999 Denver Broncos season was the team's 40th year in professional football and its 30th with the National Football League (NFL).  After winning its second consecutive Super Bowl with a win over the Atlanta Falcons in Super Bowl XXXIII in Miami, the team suffered the retirement of Super Bowl XXXIII MVP quarterback John Elway during the off-season.  Elway had spent his entire career with the Denver Broncos, and much of the focus in the weeks leading up to the season centered on the void left by Elway's departure.  Head Coach Mike Shanahan announced that third-round 1998 draft pick Brian Griese, son of Miami Dolphins Quarterback Bob Griese, would take the reins of the offense, passing over veteran and credible back-up QB Bubby Brister.

Super Bowl XXXIII: Super Bowl XXXIII was an American football game played between the American Football Conference (AFC) champion Denver Broncos and the National Football Conference (NFC) champion Atlanta Falcons to decide the National Football League (NFL) champion for the 1998 season.  The Broncos defeated the Falcons by the score of 34–19, winning their second consecutive Super Bowl.  The game was played on January 31, 1999, at Pro Player Stadium in Miami (now part of the suburb of Miami Gardens, which became a separate city in 2003).

List of Atlanta Falcons head coaches: The Atlanta Falcons are an American football team based in Atlanta, Georgia.  They are members of the South division of the National Football Conference (NFC) in the National Football League (NFL).  The Falcons joined the NFL as an expansion team in 1966 and have compiled an all-time record of 337 wins, 436 loses, and 6 ties.  The team has won the NFC West championship twice in 1980 and 1998 and the NFC South championship 4 times in 2004, 2010, 2012 and 2016.  The Falcons have appeared in two Super Bowls, losing both times; their first appearance was in Super Bowl XXXIII, with the Falcons falling to the Denver Broncos 19–34, and the second was in Super Bowl LI, where the Falcons fell to the New England Patriots 28–34 in overtime.

Clancy Barone: Clarence Barone is the current tight ends coach of the Minnesota Vikings.  Barone coached as the offensive line coach for the Denver Broncos in 2010, as well as from 2015-2016.  As the Offensive Line Coach for the Denver Broncos, his offensive line paved the way to victory in Super Bowl 50 over the Carolina Panthers.  He also served as the Broncos' tight ends coach in 2009, as well as the 2011-2014 season, which includes their Offensive record breaking season of 2013 and an appearance in Super Bowl XLVIII.  He has also served as offensive line and tight ends coach for the Atlanta Falcons, as well as tight ends coach for the San Diego Chargers.  Barone worked with All-Pro players Alge Crumpler (Falcons) and Antonio Gates (Chargers), and Julius Thomas (Broncos) all of whom made multiple Pro Bowl appearances under his guidance.

1998–99 NFL playoffs: The National Football League playoffs for the 1998 season began on January 2, 1999.  The postseason tournament concluded with the Denver Broncos defeating the Atlanta Falcons in Super Bowl XXXIII, 34–19, on January 31, at Pro Player Stadium in Miami, Florida.

2000 Orange Bowl: The 2000 FedEx Orange Bowl game was a post-season college football bowl game between the Alabama Crimson Tide and the Michigan Wolverines on January 1, 2000, at Pro Player Stadium in Miami Gardens, Florida.  Michigan defeated Alabama 35–34 in an overtime battle.  The game was part of the 1999–2000 Bowl Championship Series (BCS) of the 1999 NCAA Division I-A football season and represented the concluding game of the season for both teams.  The Orange Bowl was first played in 1935, and the 2000 game represented the 66th edition of the Orange Bowl.  The contest was televised in the United States on ABC.

Supporting paragraphs: Chad Brown (American football official) Super Bowl XXXIII
Answer: 31