Question: How many clubs were featured in  a preseason soccer tournament held at Walt Disney World's 220 acre athletic complex located in the Walt Disney World Resort?

Context paragraphs:
2014 Walt Disney World Pro Soccer Classic: The 2014 Walt Disney World Pro Soccer Classic was the fifth edition of the Walt Disney World Pro Soccer Classic, a pre-season exhibition tournament held at the ESPN Wide World of Sports Complex at the Walt Disney World Resort in Lake Buena Vista, Florida.  The 2014 edition was reportedly set to feature a field of eight teams including 5 MLS teams, two international teams, and Orlando City.  However, the schedule was released with 6 MLS teams, one international team, and Orlando City.

ESPN Wide World of Sports Complex: The ESPN Wide World of Sports Complex is a 220 acre athletic complex located in the Walt Disney World Resort, in Bay Lake, Florida, near Orlando, Florida.  The complex includes 9 venues and hosts numerous amateur and professional sporting events throughout the year.

Walt Disney World Pro Soccer Classic: The Walt Disney World Pro Soccer Classic is an annual preseason soccer tournament for clubs in North America.  Hosted by Disney, it contested at Hess Sports Fields' Field 17, part of the ESPN Wide World of Sports Complex in Lake Buena Vista, Florida.  The tournament debuted with four teams in 2010 and is broadcast online by ESPN3.

2011 Walt Disney World Pro Soccer Classic: The 2011 Walt Disney World Pro Soccer Classic was a preseason soccer tournament held at Walt Disney World's ESPN Wide World of Sports Complex.  The tournament, the second edition of the Pro Soccer Classic, was held from February 24—26, 2011 and featured three Major League Soccer clubs along one USL PRO club.

2012 Walt Disney World Pro Soccer Classic: The 2012 Walt Disney World Pro Soccer Classic was a preseason soccer tournament held at Walt Disney World's ESPN Wide World of Sports Complex.  The tournament, the third edition of the Pro Soccer Classic, was held from February 24—March 3, 2012 and featured six Major League Soccer clubs along with one USL PRO club and one Swedish Allsvenskan club.

Walt Disney World International Program: The Walt Disney World International Program is an international internship program sponsored and operated by The Walt Disney Company at the Walt Disney World Resort in Lake Buena Vista, Florida, in the United States.  The Walt Disney World International Program recruits participants (18 years and older) from outside the United States for year-long cultural exchanges with paid positions and summer-long paid internships working at the Walt Disney World Resort.

Hilton Orlando Lake Buena Vista: The Hilton Orlando Lake Buena Vista is an AAA Four-Diamond hotel located adjacent to the Disney Springs complex located on Walt Disney World Resort property in Lake Buena Vista, Florida.  The 23 acre hotel, which opened in November 1983, is among seven hotels that make up the Disney Springs Resort Area.  The Disney Springs Resort Area Hotels are located on the property of the Walt Disney World Resort in Lake Buena Vista, Florida, but are not operated by Disney.

Walt Disney World Dolphin: The Walt Disney World Dolphin is a resort hotel designed by architect Michael Graves located between Epcot and Disney's Hollywood Studios in the Walt Disney World Resort in Bay Lake, Florida, next to Disney's BoardWalk Resort area.  It opened on June 1, 1990 and is joined to its sister hotel, the Walt Disney World Swan (also designed by Graves) by a palm-tree lined covered walkway crossing a lagoon.  The Walt Disney World Swan and Dolphin is a joint venture between the Walt Disney Company, Tishman Hotel Corporation, MetLife and Starwood Hotels and Resorts.  The land the resort occupies is owned by the Walt Disney Company, while the buildings themselves are leased by Disney to the Tishman Hotel Corporation and MetLife but operated by Starwood Hotels & Resorts Worldwide under the Sheraton Hotels brand.  The Walt Disney World Swan and Dolphin are a part of the Walt Disney Collection of resorts; because of this they are Disney branded and guests of the resort have access to special Disney benefits available to Disney Resort Hotel guests only.

2013 Walt Disney World Pro Soccer Classic: The 2013 Walt Disney World Pro Soccer Classic was the fourth edition of the Walt Disney World Pro Soccer Classic, a pre-season exhibition tournament held at the ESPN Wide World of Sports Complex at the Walt Disney World Resort in Lake Buena Vista, Florida.  A total of six Major League Soccer teams participated.

2010 Walt Disney World Pro Soccer Classic: The 2010 Walt Disney World Pro Soccer Classic was a preseason soccer tournament held at Walt Disney World's ESPN Wide World of Sports Complex.  The tournament, the inaugural edition of the Pro Soccer Classic, was held from February 25—27, 2011 and featured four Major League Soccer clubs.

Supporting paragraphs: 2010 Walt Disney World Pro Soccer Classic ESPN Wide World of Sports Complex
Answer: four Major League Soccer clubs