Question: What is the nickname of the National Hockey League player born in Helsinki who played 21 NHL seasons?

Context paragraphs:
Sport in Helsinki: Helsinki has a long tradition of sports, the city gained much of its initial international recognition during the 1952 Summer Olympics, and the city has since then been very open to arranging sporting events.  Helsinki hosts fairly successful local teams in both of the most popular team-sports in Finland, football and ice hockey.  The later being a sport of passion for many Helsinkians, who usually take a stance for either of the local clubs HIFK or Jokerit.  The strong culture of ice hockey has led to Helsinki becoming the birthplace of many legendary National Hockey League stars such as Teemu Selänne, Jari Kurri and Esa Tikkanen.

Pete Babando: Peter Joseph Babando (born May 10, 1925) is a former National Hockey League player who skated for the Boston Bruins, Detroit Red Wings, Chicago Black Hawks, and New York Rangers.  During six NHL seasons, Babando scored 86 goals, 73 assists (for 159 points) in 351 regular season games.  However, Babando's mark in history was made on April 23, 1950 in Game seven of the Stanley Cup Finals.  As a member of the Red Wings, he scored a sudden death (and Cup-clinching goal) to eliminate the Rangers at 8:31 of the second overtime.  At the time he was one of the few American-born players in the NHL.  Babando scored only three playoff goals in his career.  He was born in Braeburn-Lower Burrell, Pennsylvania and raised in South Porcupine, Ontario.

Mike Grier: Michael James Grier (born January 5, 1975) is a retired American professional ice hockey winger who played for four teams in the National Hockey League (NHL) - the Edmonton Oilers, Washington Capitals, San Jose Sharks, and Buffalo Sabres.  Primarily a checking forward, he played 1,060 NHL games over 14 NHL seasons.  He was also the first U.S.-born and U.S.-trained (meaning that he played his development years in the US) black player in the NHL.  He currently works as the assistant coach of Saint Sebastian's School, where he played his high school hockey.

Teemu Selänne: Teemu Ilmari Selänne (] ), nicknamed "The Finnish Flash" (born July 3, 1970), is a Finnish former professional ice hockey winger.  He began his professional career in 1989–90 with Jokerit of the SM-liiga and played 21 seasons in the National Hockey League (NHL) for the Winnipeg Jets, Anaheim Ducks, San Jose Sharks and Colorado Avalanche.  Selänne is the highest scoring Finn in NHL history, and one of the highest overall; he retired in 2014 11th all-time with 684 goals and 15th with 1,457 points.  He holds numerous team scoring records for both the Winnipeg/Arizona franchise and the Anaheim Ducks.  His jersey number 8 was retired by the Ducks in 2015.  On January 27, 2017, in a ceremony during the All-Star Weekend in Los Angeles, Selanne was part of the second group of players to be named one of the '100 Greatest NHL Players' in history. .  On June 26, 2017, Selanne was elected to the Hockey Hall of Fame as the second Finn after Jari Kurri.

Stacy Roest: Stacy Roest (born March 15, 1974 in Lethbridge, Alberta) is a Canadian former professional hockey player who played five seasons in the National Hockey League (NHL) for the Detroit Red Wings and Minnesota Wild.  He played the final nine seasons of his playing career with the Rapperswil-Jona Lakers of the National League A, the top league in Switzerland.  He played in the Western Hockey League, the American Hockey League and the National Hockey League.  He captained Team Canada at the Spengler Cup in 2012.  He is currently Director of Player Development for the Tampa Bay Lightning of the National Hockey League.

Alex Burrows: Alexandre "Alex" Ménard-Burrows (born April 11, 1981) is a Canadian professional ice hockey left winger for the Ottawa Senators of the National Hockey League (NHL).  He is known for playing in the style of an agitator and for his ascension to the NHL from being an undrafted player in the ECHL.  After a two-year career in the Quebec Major Junior Hockey League (QMJHL), he played in the minor leagues for three seasons.  He was signed by the Vancouver Canucks in 2005 from their American Hockey League (AHL) affiliate, the Manitoba Moose.  Burrows established himself as a checking forward with the Canucks in his first three NHL seasons before emerging as a scorer with four consecutive 25+ goal seasons from 2008–09 to 2011–12.

Mike Walsh (ice hockey, born 1962): Michael Walsh (born April 3, 1962) is an American former professional ice hockey player who played in the National Hockey League (NHL).  After four seasons playing for Colgate University's men's ice hockey team, Walsh spent the first two seasons of his professional career with Malmö IF in Sweden.  Towards the end of the 1985–86 season he returned to North America, playing in two games for the Springfield Indians of the American Hockey League (AHL).  Walsh signed a contract in the off-season with Springfield's parent team, the New York Islanders, and played the next four seasons with the organization.  He played in 14 games over parts of two NHL seasons with the Islanders.  After the 1989–90 season, during which he was a member of Springfield's Calder Cup winning team, Walsh played a season in Italy for SG Cortina.  He played two more seasons in the AHL before retiring after the 1992–93 season.  Following his playing career Walsh became a head coach, coaching at the Tilton School and currently Proctor Academy.

Morris Lukowich: Eugene Morris Lukowich (born June 1, 1956) is a Canadian retired professional ice hockey player.  He was a member of the Winnipeg Jets of the World Hockey Association (WHA) and the National Hockey League (NHL) from 1976 to 1985, and later played for the Boston Bruins and Los Angeles Kings of the NHL.  Playing left wing, he played in a total of 582 NHL games, registering 199 goals and 219 assists for 418 points in eight NHL seasons.

Terry Holbrook (ice hockey): Terence Eugene Holbrook (born July 11, 1950) is a Canadian former professional ice hockey player who played in the National Hockey League (NHL) and World Hockey Association (WHA).  Drafted in the third round of the 1970 NHL Amateur Draft by the Los Angeles Kings, Holbrook played parts of two NHL seasons with the Minnesota North Stars.  He played the final two seasons of his career with the Cleveland Crusaders of the WHA.  Holbrook was born in Petrolia, Ontario, but grew up in Watford, Ontario.

1920–21 NHL season: The 1920–21 NHL season was the fourth season of the National Hockey League (NHL).  Four teams each played 24 games in a split season.  The Quebec franchise was transferred to Hamilton, Ontario, to become the Hamilton Tigers.  The Ottawa Senators won the league championship in a playoff with the Toronto St. Patricks.  The Senators went on to win the Stanley Cup by defeating the Vancouver Millionaires of the Pacific Coast Hockey Association three games to two in a best-of-five series.  This would be the last split season before the NHL changed its regular season and playoff formats.

Supporting paragraphs: Sport in Helsinki Teemu Selänne
Answer: "The Finnish Flash"