Question: Who is the winner at the 1971 PGA Championship?

full_context: Document 1: 1961 Open Championship: The 1961 Open Championship was the 90th Open Championship, played 12–15 July at Royal Birkdale Golf Club in Southport, England. Arnold Palmer won the first of two consecutive Open Championships, one stroke ahead of Dai Rees. It was the second Open for Palmer, the runner-up in his first in 1960, and the fourth of his seven major titles. He was the first American to win the Claret Jug since Ben Hogan in 1953. This was the second Open Championship at Royal Birkdale, which hosted in 1954.
Document 2: List of golfers with most PGA Tour wins: This is a list of golfers who have won five or more official (or later deemed as historically significant) money events on the PGA Tour. It is led by Sam Snead with 82 wins, Tiger Woods with 80, and Jack Nicklaus with 73.
Document 3: 1975 PGA Championship: The 1975 PGA Championship was the 57th PGA Championship, played August 7–10 at the South Course of Firestone Country Club in Akron, Ohio. Jack Nicklaus, an Ohio native, won the fourth of his five PGA Championships and the fourteenth of his eighteen major titles, two strokes ahead of runner-up Bruce Crampton. Nicklaus was the 54-hole leader, four strokes ahead of Crampton.
Document 4: Masters Tournament: The first winner of the Masters Tournament was Horton Smith in 1934, and he repeated in 1936. The player with the most Masters victories is Jack Nicklaus, who won six times between 1963 and 1986. Arnold Palmer and Tiger Woods have each won four, and Jimmy Demaret, Gary Player, Sam Snead, Nick Faldo, and Phil Mickelson have three titles to their name. Player was the tournament's first overseas winner with his first victory in 1961. Two - time champions include Byron Nelson, Ben Hogan, Tom Watson, Seve Ballesteros, Bernhard Langer, Ben Crenshaw, José María Olazábal, and Bubba Watson.
Document 5: 1968 Masters Tournament: Bob Goalby won his only major championship, one stroke ahead of Roberto De Vicenzo, the reigning British Open champion. On the back nine in the final round, Goalby birdied 13 and 14 and eagled 15 to record a 66 (− 6) and a total of 277 (− 11). At first it appeared that he had tied De Vicenzo and the two would meet in an 18 - hole Monday playoff, but De Vicenzo returned an incorrect scorecard showing a par 4 on the 17th hole, instead of a birdie 3, sunk with a two - foot putt. Playing partner Tommy Aaron incorrectly marked the 4 and De Vicenzo failed to catch the mistake and signed the scorecard. USGA rules stated that the higher written score signed by a golfer on his card must stand, and the error gave Goalby the championship. Ironically, Goalby discovered a scoring error he had made on the card he was keeping for Raymond Floyd, his playing partner in the final round, which he corrected at the scorer's tent. He had marked Floyd down for a par - 3 on the 16th hole, when Floyd had actually bogeyed the hole. Floyd ended up in a tie for seventh place with, among others, Aaron. Both Aaron and Floyd would win the Masters in future years, Aaron in 1973 and Floyd in 1976.
Document 6: 1971 PGA Championship: Jack Nicklaus won the second of his five PGA Championships, two strokes ahead of Billy Casper, the reigning Masters champion. Nicklaus led wire-to-wire, and held a four-stroke lead over Gary Player after 54 holes, with Casper seven shots back. The two were pre-tournament favorites, along with Arnold Palmer, who shot an opening round 75 and finished at 289 (+1), eight strokes back.
Document 7: List of men's major championships winning golfers: Jack Nicklaus has won the most majors; he won 18 during his career. Second on the list is Tiger Woods, who has won 14 majors to date; his most recent major victory was at the 2008 U.S. Open. Walter Hagen is third with 11 majors; he and Nicklaus have both won the most PGA Championships with five. Nicklaus also holds the record for the most victories in the Masters, winning the competition six times. Nicklaus also shares the record for the most U.S. Open victories with Willie Anderson, Bobby Jones and Ben Hogan, each winning this competition four times. Harry Vardon holds the record for the most Open Championship victories, winning six times during his career. Nicklaus, Woods, Hogan, Gary Player and Gene Sarazen are the only golfers to have won all four of the majors during their career, thus achieving the so - called career slam.
Document 8: The Honda Classic: Some celebrated players have won this tournament, including Nicklaus in 1977 and 1978, the only consecutive winner in its history. However, the tournament had acquired a reputation for struggling to attract the top players as it moved from course to course in South Florida. Since 2007, The Honda Classic has seen a vastly improved player field, largely due to the decision to make PGA National the tournament's permanent home.
Document 9: 1965 Masters Tournament: Jack Nicklaus, age 25, won the second of his six Masters titles with a score of 271 (−17), at the time a tournament record, three strokes better than Ben Hogan's 274 in 1953. It was equaled in 1976 by Raymond Floyd and surpassed in 1997 by Tiger Woods' 270 (−18). Nicklaus' winning margin of nine strokes also stood until 1997, when Woods was victorious by twelve strokes to win his first green jacket. It was the fourth of a record 18 major titles won by Nicklaus in his career.
Document 10: Men's major golf championships: Along with his record 18 major victories, Jack Nicklaus also holds the record for most runner - up finishes in major championships, with 19, including a record 7 at the Open Championship. Phil Mickelson has the second most with 11 runner - up finishes after the 2016 Open Championship, which includes a record 6 runner - up finishes at the U.S. Open, the one major he has never won. Arnold Palmer had 10 second places, including three in the major he never won, the PGA Championship. There have been three golfers with 8 runner - up finishes -- Sam Snead, Greg Norman and Tom Watson. Norman shares the distinction of having lost playoffs in each of the four majors with Craig Wood (who lost the 1934 PGA final -- at match play -- on the second extra hole).
Document 11: List of men's major championships winning golfers: Jack Nicklaus has won the most majors, achieving 18 victories during his career. Second on the list is Tiger Woods, who has won 14 majors to date; his most recent major victory was at the 2008 U.S. Open. Walter Hagen is third with 11 majors; he and Nicklaus have both won the most PGA Championships with five. Nicklaus also holds the record for the most victories in the Masters, winning the tournament six times. Additionally, Nicklaus shares the record for the most U.S. Open victories with Willie Anderson, Bobby Jones and Ben Hogan, each winning four times. Harry Vardon holds the record for the most Open Championship victories, winning six times during his career. Nicklaus, Woods, Hogan, Gary Player and Gene Sarazen are the only golfers to have won all four of the majors during their career, thus achieving the so - called career slam.
Document 12: 1980 PGA Championship: The 1980 PGA Championship was the 62nd PGA Championship, held August 7–10 at the East Course of Oak Hill Country Club in Rochester, New York. Jack Nicklaus won his fifth PGA Championship, seven strokes ahead of runner-up Andy Bean. The victory tied Nicklaus with Walter Hagen, who won five PGA titles in match play competition in the 1920s.
Document 13: Jack Nicklaus: Jack William Nicklaus (born January 21, 1940), nicknamed The Golden Bear, is an American retired professional golfer. In the opinion of many observers, he is the greatest golfer of all time. During a span of more than 25 years, he won a record 18 major championships, three ahead of Tiger Woods (15). Nicklaus focused on the major championships—Masters Tournament, U.S. Open, Open Championship and PGA Championship—and played a selective schedule of regular PGA Tour events. He has competed in more major championships (164) than any other player. He finished with 73 PGA Tour victories, third on the all-time list behind Sam Snead (82) and Tiger Woods (81).
Document 14: 1985 Masters Tournament: Bernhard Langer won the first of his two major championships, both Masters, two strokes ahead of runners-up Seve Ballesteros, Raymond Floyd, and Curtis Strange. A 69 (−3) on Saturday put Floyd in the lead after 54 holes at 212 (−4); Strange was a stroke back, with Langer and Ballesteros two strokes back. Despite an opening round 80, Strange led by three strokes with six holes to play in the final round, but made key bogeys at 13 and 15 when his attempts to reach both greens in two shots found water instead and finished two strokes back. It was Strange's only top-5 finish at Augusta, but he won consecutive U.S. Opens in 1988 and 1989.
Document 15: List of Masters Tournament champions: Jack Nicklaus holds the record for the most Masters victories, winning the tournament six times during his career. Nicklaus is also the oldest winner of the Masters: he was 46 years 82 days old when he won in 1986. Nicklaus, Nick Faldo, and Tiger Woods co-hold the record for most consecutive victories with two. Woods was the youngest winner of the Masters, 21 years 104 days old when he won in 1997. Woods also set the record for the widest winning margin (12 strokes), and the lowest winning score, with 270, 18 below par (- 18) in 1997. The latter was equaled by Jordan Spieth in 2015.
ground_truth: an American retired professional golfer
sub_queries: 1971 PGA Championship >> winner Answer: Jack Nicklaus
Who is Jack Nicklaus ? Answer: an American retired professional golfer