Question: When did Bart Starr play as quarterback for the Green Bay Packers in the Super Bowl?

Context paragraphs:
Super Bowl II: The second AFL-NFL World Championship Game in professional football, known retrospectively as Super Bowl II, was played on January 14, 1968, at the Orange Bowl in Miami, Florida.  The National Football League (NFL)'s defending champion Green Bay Packers defeated the American Football League (AFL) champion Oakland Raiders by the score of 33–14.

Jim McMahon: James Robert McMahon, Jr. (born August 21, 1959) is a former American football player.  He played college football at Brigham Young University, where he was a two-time All-American (1980, 1981) and later in the professional ranks with the Chicago Bears, San Diego Chargers, Philadelphia Eagles, Minnesota Vikings, Arizona Cardinals, Cleveland Browns, and Green Bay Packers.  He won two Super Bowl titles, the first with the Bears in Super Bowl XX where he was the starting quarterback, and the second with their rivals, the Green Bay Packers, in Super Bowl XXXI where he was a backup to Brett Favre.  McMahon was inducted into the College Football Hall of Fame in 1998.

1975 Green Bay Packers season: The 1975 Green Bay Packers season was their 56th season in the National Football League.  The club posted a 4–10 record under new coach Bart Starr, earning them a fourth-place finish in the NFC Central division.  The Packers got off to an 0-4 start, but finally beat the Cowboys in Dallas for Bart Starr's first coaching win.  After a 1-8 start, the Packers would end the season on a positive note winning three of their final five games to finish with a 4-10 record.

1983 Green Bay Packers season: The Green Bay Packers season was their 64th season in the National Football League.  The club posted an 8–8 record under ninth-year head coach Bart Starr to finish second in the NFC Central division.  The team set an NFL record for most overtime games played in one season with five, winning two and losing three.  On "Monday Night Football" in October, Green Bay defeated the Washington Redskins, 48–47, in the highest-scoring game in MNF history.  It was voted one of the ten best Packer games and is featured on the NFL Films collection, "The Green Bay Packers Greatest Games."

Bart Starr: Bryan Bartlett "Bart" Starr (born January 9, 1934) is a former professional American football player and coach.  He played quarterback for the Green Bay Packers of the National Football League (NFL) from 1956 through 1971.  Starr was the only quarterback in history to lead a team to five league championships (1961–62, 1965–67), before Tom Brady tied the record during the 2016 season.  Bart also led his team to victories in two Super Bowls, I and II.  As the Packers' head coach, he was less successful, compiling a 52–76–3 ( ) record from 1975 through 1983.

1978 Green Bay Packers season: The 1978 Green Bay Packers season was their 59th season in the National Football League.  The club posted an 8–7–1 record under coach Bart Starr, earning them a second-place finish in the NFC Central division.  This marked the first season the Packers were above .500 since 1972.  The Packers got off to a 6-1 start.  However, most of the wins came against weaker teams, and once the scheduled toughened up the Packers struggled winning only one and tying one of their next six games.  After a big win in Tampa Bay over the Buccaneers, the 8-5-1 Packers still had a shot at a NFC Central Title.  However, the team would lose both of their final games, closing out with a 31-14 loss to the Los Angeles Rams and at 8-7-1 finished in a first place tie .  The Packers lost the tie breaker to the Minnesota Vikings, by tying (10 - 10 ) and losing to the Vikings ( 7 - 21) and missed the playoffs.

1976 Green Bay Packers season: The 1976 Green Bay Packers season was their 57th season in the National Football League.  The club posted a 5–9 record under coach Bart Starr, earning them a fourth-place finish in the NFC Central division.  The Packers struggled, and finished in last place in the NFC Central with a 5-9 record, as the Quarterback position began to resemble a revolving door, as Lynn Dickey became the latest young Quarterback to struggle with Interceptions.

Green Bay Packers Fan Hall of Fame: The Green Bay Packers Fan Hall of Fame (capitalized by the organization as the Green Bay Packers FAN Hall of Fame) was the first hall of fame built to honor fans of a professional football team.  It was established by the Green Bay Packers and the Green Bay Packers Hall of Fame in 1998.  Fans may nominate themselves or others for inductions by submitting an essay of 500 words or less, accompanied by a photo or a two-minute video, explaining why they or another person are the ultimate Packers fan and deserve recognition.  Ten finalists are chosen by a selection committee composed of members of the Packer Hall of Fame board and members of the Green Bay Packers' front office, and are profiled in the Milwaukee Journal Sentinel, as well as on the Packers' website.  Fans are then given an opportunity to vote on the 10 finalists whose stories were profiled.

Athletes in Action/Bart Starr Award: The Athletes in Action/Bart Starr Award is given annually to an NFL player who best exemplifies outstanding character and leadership in the home, on the field and in the community.  Nominees are gathered from the Public Relations Directors of each NFL team, the past winners of the Bart Starr Award, the Athletes in Action Pro Staff working with NFL teams and Bart Starr himself.  Ballots are sent to each team and voting takes place at the same time as the Pro Bowl selections.  The votes are tabulated and the winner is announced at the annual Super Bowl Breakfast, an NFL-sanctioned event hosted by Athletes in Action, the sports ministry of Campus Crusade for Christ.  The award, bearing the name of the Pro Football Hall of Famer, honors Starr’s lifelong commitment to serving as a positive role model to his family, teammates, and community.

2013 Green Bay Packers season: The Green Bay Packers season was the franchise's 94th season in the National Football League, the 95th overall and the eighth under head coach Mike McCarthy.  The Packers came into the 2013 season looking to win the NFC North for the 3rd year in a row.  They were coming off a 45-31 loss to the San Francisco 49ers in the NFC Divisional Playoffs.  The Packers started the 2013 season with a rematch with the 49ers in San Francisco.  They lost the game 34-28.  After winning their home opener against the Redskins, they lost 34-30 in Cincinnati to the Bengals after they had a 30-14 lead in the 3rd quarter.  After the loss, the Packers would win 4 games in a row to sit at 5-2 before losing a Monday Night game at home to the Bears 27-20.  In that game, the Packers would lose star quarterback Aaron Rodgers to a broken collarbone in the 1st quarter.  He would be replaced by Scott Tolzien and sometimes Matt Flynn.  In week 12, the Packers tied the Vikings 26-26.  It was Green Bay's first tie since 1987.  The Packers would lose the next game 40-10 to the Lions on Thanksgiving to sit at 5-6-1, and looking like being on the verge of missing the postseason for the first time since 2008.  The Packers would then beat the Falcons 22-21 to even their record at 6-6-1.  The following week, the Packers defeated the Dallas Cowboys 37-36 in Dallas after they had trailed 26-3 at halftime.  The comeback was the largest in franchise history.  The Packers would then lose a shootout with the Pittsburgh Steelers 38-31 at home to sit at 7-7-1, the first meeting between the teams since Super Bowl XLV.  The next week, the Packers defeated the Chicago Bears 33-28 at Soldier Field to clinch the NFC North in a game in which the winner would've clinched the division.  The game was famously well known for a touchdown catch made by Randall Cobb from Aaron Rodgers with less than a minute remaining to seal the win.  The play came on a 4th and 8 situation in which Cobb was wide open near the endzone.  The Packers entered the playoffs as the 4 seed in the NFC.  In the wild card game, they lost 23-20 in a rematch with the 49ers on a Phil Dawson field goal as time expired.  The game was one of the coldest in NFL playoff history, with a final temperature of 5 °F (-15 °C)

Supporting paragraphs: Bart Starr Super Bowl II
Answer: January 14, 1968