Question: Who was the starting quarterback for the vikings?

Disambiguated questions and answers:
context: No context provided
question: Who was the starting quarterback for the Vikings in 2017?
short_answers: Case Keenum
context: In 2009, the Vikings recruited veteran quarterback Brett Favre out of retirement to be their new starting quarterback. In Week 13 of the 2010 season, Favre suffered a chest injury that ended his NFL-record streak of consecutive starts at 297 (321 including postseason games), and Tarvaris Jackson reclaimed the starting spot for Week 14. However, Jackson was injured himself in Week 15, giving rookie Joe Webb a chance to stake a claim for the position. He was unable to hold onto the position as Donovan McNabb was signed as a free agent to replace Favre, who retired at the end of the 2010 season. After going 1–5 through the first six games of 2011, though, McNabb was replaced by first-round draft pick Christian Ponder, who retained the starting position for the remainder of the season and for the whole of 2012. However, he was plagued by indifferent form and the Vikings signed Matt Cassel – recently released by the Kansas City Chiefs. When Ponder suffered an injury early in the 2013 season, Cassel was given his first start for the Vikings in week 4 in the NFL International Series game against the Pittsburgh Steelers at Wembley Stadium, London. He started the following game, but was replaced in week 7 by Josh Freeman, recently signed after his release by the Tampa Bay Buccaneers. However, he was injured during the game and did not make another start for the Vikings, allowing Ponder to reclaim the starting role. Cassel then returned as the starter in week 14, and retained the role for the rest of the season and into 2014. After three games, he was placed on injured reserve and first-round draft pick Teddy Bridgewater took over for the week 4 game against the Atlanta Falcons. Bridgewater himself was injured late in the game, allowing Ponder the chance to come back in for the following week, but the rookie soon returned and has held the starting berth until suffering a knee injury in practice during the 2016 preseason. Shaun Hill started the season opener and Sam Bradford took over in week 2. Ahead of the 2018 season, the Vikings signed free agent quarterback Kirk Cousins from the Washington Redskins on a three-year, fully guaranteed $84 million contract. He started 31 consecutive regular season games to start his Vikings career before sitting out the final game of 2019 with the team's playoff berth already secured; Sean Mannion started in his place.
question: Who was the starting quarterback for the Vikings in 2016?
short_answers: Sam Bradford
wikipage: List of Minnesota Vikings starting quarterbacks
context: No context provided
question: Who was the starting quarterback for the Vikings in 2015?
short_answers: Teddy Bridgewater

Long-form answers:
knowledge: content: With the Vikings, Bridgewater threw for 14 touchdowns in each of his first two seasons, including winning the NFC North and making a Pro Bowl appearance in 2015. The following preseason, Bridgewater suffered a severe injury to his left leg, which knocked him out for all but one offensive series of the next two seasons.
wikipage: Teddy Bridgewater
content: In Week 1, on Monday Night Football, Bradford completed 27 of 32 pass attempts for 346 yards and 3 touchdowns in a 29–19 win over the New Orleans Saints, earning him his first NFC Offensive Player of the Week award. He was inactive for the Week 2 game against the Pittsburgh Steelers due to a knee injury.
wikipage: Sam Bradford
long_answer: The Minnesota Vikings' starting quarterback in the 2015 season was Teddy Bridgewater. However, he suffered a leg injury in the 2016 preseason and was replaced by Shaun Hill for the season's first game, and by Sam Bradford thereafter. After Bradford was injured early in the 2017 season, he was replaced by Case Keenum.