Context_1 : Flyer Comet was a wooden roller coaster located at Whalom Park in Lunenburg, Massachusetts. The roller coaster was built in 1940 and operated until is permanent closure in 2000. In 2006, after the lift motor and part of its electronics were gutted, Flyer Comet was demolished. Context_2 : The Blue Yonder Twin Engine EZ Flyer is a Canadian designed and built, pusher configuration twin-engined, tandem two-seat, open cockpit aircraft provided as a completed aircraft or in kit form by Blue Yonder Aviation. Context_3 : Nickelodeon Land is the current children's park in Pleasure Beach Blackpool, England. It opened on 4 May 2011 and is in the place of Beaver Creek which closed on 5 September 2010 after Amanda Thompson announced that the Pleasure Beach would be working with Nickelodeon to open a new and modern children's theme park. Context_4 : Sea Dragon is a junior wooden roller coaster located at the Columbus Zoo and Aquarium in Powell, Ohio. The ride is in the Jungle Jack's Landing section of the zoo. Built by Philadelphia Toboggan Coasters (PTC) under famed designer John C. Allen, the roller coaster opened in 1956 as Jet Flyer. It was one of three junior wooden coasters that Allen designed shortly after becoming president of PTC in 1954 – the other two were Flyer at Hunt's Pier and Valley Volcano at Angela Park. They were based on earlier designs developed by another legendary coaster architect Herbert Schmeck, who was Allen's mentor. Following the dismantling of the other two coasters in the late 1980s, Sea Dragon became the oldest roller coaster from John Allen to remain in operation. Context_5 : The Flockton Flyer was a children's TV series made by Southern Television for the ITV network. It was a popular programme, which ran to two series, and provided early screen appearances for upcoming actors such as Peter Duncan and Gwyneth Strong, as well as some well-known 1970s classical and situation comedy actors. The on-screen title for series 1 was "The Flockton Flyer", but for series 2 it had become "Flockton Flyer". This may have been a result of complaints from some railway enthusiasts, who pointed out that it is convention that locomotive names do not start with the definite article "The". However, whilst locomotive names do not take the definite article, train names often do so (for example, "The Flying Scotsman" or "The Blue Train"), and in the programme the locomotive carries engine nameplates, and also a train-name headboard, all marked with the same Flockton Flyer name. Context_6 : The Blue Yonder EZ Flyer is a Canadian-designed-and-built, tandem two-seat, open cockpit, pusher configuration, recreational and training aircraft provided as a completed aircraft or in kit form by Blue Yonder Aviation. Context_7 : Ravine Flyer II is a hybrid wooden roller coaster located at Waldameer Park in Erie, Pennsylvania, United States. It was ranked as the best new ride of 2008 by Amusement Today Magazine. The "Ravine Flyer II" took place of the park's old Ravine Flyer, which was removed in 1938 due to a tragedy resulting in a man's death. Initial concepts for the replacement ride were developed by Custom Coasters International in the early 1990s, further developed by Dennis McNulty several years later, then finalized and constructed by The Gravity Group with Jeff Mason overseeing construction. Context_8 : The blue star tattoo legend occasionally surfaces in American elementary and middle schools in the form of a flyer that has been photocopied through many generations, which is distributed to parents by concerned school officials. It has also become popular on Internet mailing lists and websites. This legend states that a temporary lick-and-stick tattoo soaked in LSD and made in the form of a blue star (the logo of the Dallas Cowboys is often mentioned), or of popular children's cartoon characters, such as Mickey Mouse and Bart Simpson, is being distributed to children in the area in order to get them 'addicted to LSD', even though LSD is rarely addictive. Context_9 : Blue Flyer (formerly Zipper Dipper and Warburtons Milk Roll-A-Coaster) is a Wooden roller coaster at Nickelodeon Land, Blackpool Pleasure Beach in Blackpool, England. It was built in 1934. It is believed to have been built by Charlie Paige. It is a family coaster. Context_10 : Ravine Flyer III is a junior steel roller coaster that is located at Waldameer Park in Erie, Pennsylvania, United States. The Ravine Flyer III was installed in the park 8 years before Ravine Flyer II. fact_1 : Blue Flyer (formerly Zipper Dipper and Warburtons Milk Roll-A-Coaster) is a Wooden roller coaster at Nickelodeon Land, Blackpool Pleasure Beach in Blackpool, England. fact_2 :  It opened on 4 May 2011 and is in the place of Beaver Creek which closed on 5 September 2010 after Amanda Thompson announced that the Pleasure Beach would be working with Nickelodeon to open a new and modern children's theme park. Answer: 2011
Output: In what year did the childrens park where Blue Flyer is located open?