Question: he Columbus Blue Jackets play in a league that has how many teams ?

Context paragraphs:
Ohio Junior Blue Jackets: The Ohio Junior Blue Jackets were a Tier 1 junior ice hockey team playing in the East Division of the United States Hockey League (USHL).  The 2006-07 USHL media guide (p. 37) lists the Ohio Junior Blue Jackets as the successor to the Thunder Bay Flyers, who played their last USHL game in 2000; however, the team infrastructure was based upon a move of the Cleveland Junior Barons of the NAHL.  The Junior Blue Jackets' home ice was at Nationwide Arena, which is also home to the National Hockey League team Columbus Blue Jackets.

2014–15 Columbus Blue Jackets season: The 2014–15 Columbus Blue Jackets season was the 15th season for the National Hockey League franchise that was established on June 25, 1997.  The Blue Jackets missed the playoffs despite qualifying the previous year.  The Blue Jackets finished strong, going 15-1-1 in their final 17 games.

Columbus Blue Jackets Radio Network: The Eldorado Scioto Downs Columbus Blue Jackets Radio Network is a 37 station radio network operated by the Columbus Blue Jackets of the National Hockey League that provides broadcasts for all the team's games.  Bob McElligott is the play-by-play announcer.  In addition to his duties, McElligott also handles the pre- and post-game shows alongside Milan Jordan.  Eldorado Resorts' Scioto Downs Racino owns the naming rights to the network and the flagship station since 2010 is WBNS-FM in Columbus.  Part of the season's games are also broadcast on WWCD 102.5FM in Columbus in the event of any scheduling conflicts on WBNS-FM due to overlapping Ohio State Buckeyes football or basketball.

National Hockey League: The National Hockey League (NHL; French: "Ligue nationale de hockey—LNH" ) is a professional ice hockey league currently comprising 31 teams: 24 in the United States and 7 in Canada.  Headquartered in New York City, the NHL is considered to be the premier professional ice hockey league in the world, and one of the major professional sports leagues in the United States and Canada.  The Stanley Cup, the oldest professional sports trophy in North America, is awarded annually to the league playoff champion at the end of each season.

2013–14 Columbus Blue Jackets season: The 2013–14 Columbus Blue Jackets season was the 14th season for the National Hockey League franchise that was established on June 25, 1997.  They will now be playing in the Eastern Conference as a member of the Metropolitan Division.  As a result of their move to the Metropolitan Division, the Blue Jackets became the fourth "Big 4" sports league team from Ohio to share a division with a team from Pittsburgh.  The others are the Cincinnati Bengals and Cleveland Browns of the National Football League and the Cincinnati Reds of Major League Baseball - Ohio teams and Pittsburgh teams have generally been rivals over the years.  The Blue Jackets also made it to the playoffs, making it the second time in their franchise's history to qualify for the Stanley Cup Playoffs.

List of Columbus Blue Jackets players: The Columbus Blue Jackets are a professional ice hockey team based in Columbus, Ohio, United States.  They are members of the Metropolitan Division of the Eastern Conference of the National Hockey League (NHL).  The Blue Jackets began play in 2000 as an expansion franchise.  As of May 2011, 173 players have appeared in at least one game with the Blue Jackets: 15 goaltenders and 158 skaters (forwards and defensemen).

Jody Shelley: Jody Shelley (born February 7, 1976) is a Canadian former professional ice hockey left winger.  During his National Hockey League (NHL) career he played for the Columbus Blue Jackets, San Jose Sharks, New York Rangers and the Philadelphia Flyers.  He was known as an enforcer and had the most regular season major penalties for fighting since he joined the league; when he retired – on August 9, 2013 – he had 173.  Shelley rejoined the Columbus Blue Jackets in August 2013 when he was named a broadcast associate and team ambassador.  In May 2014 he became the Blue Jackets TV color analyst alongside Jeff Rimer.

Sonny Milano: Frank "Sonny" Milano (born May 12, 1996) is an American professional ice hockey forward currently within the Columbus Blue Jackets organization.  Milano was selected by the Columbus Blue Jackets in the first round, 16th overall, of the 2014 NHL Entry Draft.

Paul Bittner: Paul Bittner (born November 4, 1996) is an American professional ice hockey Winger who is currently assigned to the Cleveland Monsters of the American Hockey League (AHL) as a prospect of the Columbus Blue Jackets in the National Hockey League (NHL).  Bittner has played major junior hockey with the Portland Winterhawks of the Western Hockey League (WHL).  Bittner was rated as a top prospect who was widely projected to be a first round selection in the 2015 NHL Entry Draft.  He was, however, selected 38th overall, in the second round by the Blue Jackets in the 2015 NHL Entry Draft.

Boone Jenner: Boone Jenner (born June 15, 1993) is a Canadian professional ice hockey player, who is currently an alternate captain of the Columbus Blue Jackets of the National Hockey League (NHL).  Jenner was selected by the Columbus Blue Jackets in the 2nd round (37th overall) of the 2011 NHL Entry Draft.

Supporting paragraphs: Paul Bittner National Hockey League
Answer: 31 teams