Question: What is the birthdate of this Canadian former professional ice hockey player, who played in the National Hockey League for 12 seasons and scored the Cup-winning goal in the 1970 Stanley Cup Finals?
Context: Ernest Hope "Ernie" McLea (February 5, 1876 – June 17, 1931) was a Canadian ice hockey player.  McLea played in the 1890s for the Montreal Victorias and was a member of four Stanley Cup-winning teams.  He scored the first hat trick in Stanley Cup play, and scored the Stanley Cup-winning goal in a challenge game in 1896. Robert Gordon Orr, OC (born March 20, 1948) is a Canadian former professional ice hockey player, widely acknowledged as one of the greatest hockey players of all time.  Orr used his ice skating speed, scoring, and play-making abilities to revolutionize the position of defenceman.  He played in the National Hockey League (NHL) for 12 seasons, starting with 10 with the Boston Bruins followed by two with the Chicago Black Hawks.  Orr remains the only defenceman to have won the league scoring title with two Art Ross Trophies.  He holds the record for most points and assists in a single season by a defenceman.  Orr won a record eight consecutive Norris Trophies as the NHL's best defenceman and three consecutive Hart Trophies as the league's most valuable player (MVP).  Orr was inducted into the Hockey Hall of Fame in 1979 at age 31, the youngest to be inducted at that time.  On January 27, 2017, in a ceremony during the All-Star Weekend in Los Angeles, Orr was part of the second group of players to be named one of the '100 Greatest NHL Players' in history.  After his hockey career, he became a well-known scout for many professional teams.  He also spends time talking to and mentoring young skaters. Jim Paek (Korean: 백지선, Baek Chi-sun , born April 7, 1967) is a Canadian former professional ice hockey player, who is currently the director of hockey for the Korea Ice Hockey Association and head coach of the South Korean national team.  Paek played in the National Hockey League (NHL) from 1990–91 to 1994–95, and won the Stanley Cup twice, in 1991 and 1992 with the Pittsburgh Penguins.  He is the first Korean-born hockey player to both play in the NHL, and have his name engraved on the Stanley Cup. Edwin Vernon "Shadow" Westfall (born September 19, 1940) is a retired Canadian professional ice hockey player who played 18 seasons in the National Hockey League with the Boston Bruins and the New York Islanders from 1961 until 1978–79.  Notable as a defensive specialist often tasked with defending against the star scorers of enemy teams, Westfall played most of his career as a right wing, although he played stints on defence in his earlier years and at centre in his later years.  He is known for being on the ice and covering the right defence position for Bobby Orr when Orr scored his legendary flying goal in the 1970 Stanley Cup Finals. The 1970 Stanley Cup Finals was contested by the Boston Bruins and the St. Louis Blues, appearing in their third straight finals.  The Bruins were making their first appearance in the final since .  The Bruins would win the series 4–0, their first Stanley Cup victory in 29 years.  Bobby Orr scored the Cup-winning goal on Glenn Hall, with an assist from Derek Sanderson, at forty seconds of overtime, and the subsequent image of Orr flying through the air, his arms raised in victory — he had been tripped by Blues' defenseman Noel Picard at the moment of shooting — is one of the most famous and recognized hockey images of all time.  With the win, the Bruins became the first American team to win the Stanley Cup since the Chicago Blackhawks in . Frederick Alexander "The Fog" Shero (October 23, 1925 – November 24, 1990) was a Canadian professional ice hockey player, coach, and general manager.  He played for the New York Rangers of the National Hockey League (NHL).  However, he spent most of his playing career in the minor leagues.  Following his playing career, Shero went into coaching.  He spent 13 years coaching in the minor leagues before making it to the NHL.  As the head coach of the NHL's Philadelphia Flyers, Shero won the Stanley Cup in 1974 and 1975 and reached the Stanley Cup Finals a third time, in 1976.  He also had four consecutive seasons of having a 0.700 or better winning percentage and remains the Flyers all-time leader in coaching victories.  Shero controversially left the Flyers following the 1977–78 season to become the head coach of the New York Rangers, whom he led to the Stanley Cup Finals in his first season.  He resigned from the Rangers after coaching for less than three seasons.  Shero had a unique style of coaching that led to several innovations that are still used today.  He was the first coach to hire a full-time assistant coach, employ systems, have his players use in season strength training, study film, and he was one of the first coaches to utilize a morning skate.  In 2013 Shero was recognized for his contributions when he was elected to the Hockey Hall of Fame as a builder. Robert Norman "Badger Bob" Johnson (March 4, 1931 – November 26, 1991) was an American college, international, and professional ice hockey coach.  He coached the Wisconsin Badgers men's ice hockey team from 1966 to 1982, where he led the Badgers to seven appearances at the NCAA Men's Ice Hockey Championships, including three titles.  During his time as the head coach at Wisconsin, Johnson also coached the United States men's national ice hockey team at the 1976 Winter Olympics and seven other major championships, including the Canada Cup and IIHF World Championships.  He then coached the Calgary Flames for five seasons that included a Stanley Cup Finals loss in 1986.  Johnson achieved the peak of his professional coaching career in his only season as coach of the Pittsburgh Penguins in 1990–91, when the Penguins won the 1991 Stanley Cup Finals, the first Stanley Cup in team history.  In August 1991, following hospitalization due to a brain aneurysm, Johnson was diagnosed with brain cancer.  He died on November 26 of the same year. Frederick "Doc" Doherty (June 15, 1887 – February 12, 1961) was a Canadian professional ice hockey player.  Doherty played hockey for several professional ice hockey teams from 1908 until 1916, including a stint with the Toronto Ontarios in the National Hockey Association (NHA).  He also played in the Maritime Professional Hockey League and the Ontario Professional Hockey League.  After returning from World War I duty, he played one game in the National Hockey League with the Montreal Canadiens to end his career.  He played on several league champions, leading to play in several Stanley Cup championships, but was not a member of a Stanley Cup-winning team. Patric Gösta Hörnqvist (] ; born 1 January 1987) is a Swedish professional ice hockey player currently playing for the Pittsburgh Penguins in the National Hockey League.  He has also played for the Nashville Predators.  Hörnqvist won his first Stanley Cup when the Penguins defeated the San Jose Sharks in six games in the 2016 Stanley Cup Finals.  In 2017, Hörnqvist scored the Cup-winning goal as the Penguins repeated as Stanley Cup champions. The 2015 Clarkson Cup was a women's ice hockey tournament that was contested in Markham, Ontario to determine the champion of the Canadian Women's Hockey League from March 4 to March 7, 2014.  The Boston Blades defeated the Montreal Stars by a 3-2 tally in overtime to claim their second title.  The tournament was played at Markham Centennial Centre.  The overtime-winning goal was scored by Janine Weber, who became the first European player to score a Cup-winning goal.  Weber's stick that she used to score the Cup-winning goal was donated to the Hockey Hall of Fame.
Answer: March 20, 1948