Question: Which state was the 2011 ISAF Sailing World Championships - Star held in?

Context paragraphs:
Perth: Perth ( ) is the capital and largest city of the Australian state of Western Australia.  It is the fourth-most populous city in Australia, with a population of around 1.94 million (as of 27 2017 ) living in Greater Perth.  Perth is part of the South West Land Division of Western Australia, with the majority of the metropolitan area located on the Swan Coastal Plain, a narrow strip between the Indian Ocean and the Darling Scarp.  The first areas settled were on the Swan River, with the city's central business district and port (Fremantle) both located on its shores.

2003 ISAF Sailing World Championships: 2003 ISAF Sailing World Championships was the first edition of the ISAF Sailing World Championships and was held in Cadiz, Spain from 11 September to 24 September.

2014 ISAF Sailing World Championships: The 2014 ISAF Sailing World Championships, was held in Santander, Spain, this was the fourth edition of the ISAF Sailing World Championships.  It is the world championships for all disciplines used at the upcoming Olympics.  What gives this event greater significance is that it was used as qualification for the 2016 Summer Olympics in Brazil.

Zachary Plavsic: Zachary Plavsic (Serbian: Захари Плавишић ; born January 15, 1983) is a Canadian sailior of Serbian background.  Plavsic was born and raised in the city of Vancouver, BC, Canada.  He has Represented Canada in two Olympic Games.  In the 2008 Summer Olympics in Beijing, China, Plavsic finished 23rd.  In the 2012 Summer Olympics in London, United Kingdom, Plavsic placed in 8th.  In the 2011 ISAF Sailing World Cup, Plavsic finished Second and at the 2011 ISAF Sailing World Championships, Plavsic finished in 12th spot.

Tetsuya Matsunaga: Tetsuya Matsunaga (松永 鉄也 , Matsunaga Tetsuya , born April 15, 1979 in Kyoto) is a Japanese sailor, who specialized in two-person dinghy (470) class.  He represented Japan, along with his partner Taro Ueno, at the 2008 Summer Olympics, and has also been training for Three Bond Sailing Team in Kyoto throughout most of his sporting career under his longtime coach and mentor Kenji Nakamura.  As of September 2014, Matsunaga is ranked twenty-sixth in the world for two-person dinghy class by the International Sailing Federation, following his successes at the South American Championships, ISAF Sailing World Cup Series, and 2014 ISAF Sailing World Championships in Santander, Spain.

2011 ISAF Sailing World Championships – Star: The Star class at the 2011 ISAF Sailing World Championships was held in Perth, Australia between December 11 and 17, 2011.

2011 ISAF Sailing World Championships: The 2011 ISAF Sailing World Championships was held in Perth, Western Australia, this was the third edition of the ISAF Sailing World Championships.  It is the world championships for all disciplines used at the upcoming Olympics.  As it used to allocate 75% of the qualification quota for the 2012 Summer Olympics this event has added significance.

2007 ISAF Sailing World Championships: 2007 ISAF Sailing World Championships was the second edition of the ISAF Sailing World Championships and was held in Cascais, Portugal from 28 June to 13 July.

Robert Stanjek: Robert Stanjek (born 7 May 1981 in Rüdersdorf, Brandenburg) is a German sailor, who specialized in two-person keelboat (Star) class.  He represented Germany, along with his partner Frithjof Kleen in the Star class at the 2012 Summer Olympics, and also captured a silver medal at the 2011 ISAF Sailing World Championships in Perth, Australia.  Stanjek has also been training throughout most of his sporting career for the North German Sailing Regatta (German: "Norddeutscher Regatta Verein" ) in Hamburg under his personal coach Alan Smith.  As of November 2014, Stanjek is ranked eighth in the world for the two-person keelboat by the International Sailing Federation, following his first-place effort at the ISAF World Cup Series and Star World Championships in Malcesine, Italy.

2018 Sailing World Championships: The 2018 ISAF Sailing World Championships, will held in Aarhus, Denmark, this was the five edition of the ISAF Sailing World Championships.  It is the world championships for all disciplines used at the next Olympics.  What gives this event greater significance is that it is also used as qualification for the 2020 Summer Olympics in Japan.

Supporting paragraphs: 2011 ISAF Sailing World Championships – Star Perth
Answer: Western Australia