Question: What is the name of the artificial island surrounded by a river at the Magic kingdom?

Context paragraphs:
Archipelago of San Bernardo: The Archipelago of San Bernardo (Spanish: "" ) is a set of nine coastal coral islands and one artificial island (ten in total) belonging to and governed by Colombia, located in the Gulf of Morrosquillo in the Caribbean Sea, with an approximate area of 213 km².  Administratively, the archipelago belongs to the Bolívar Department, with the exception of Boquerón Island, which belongs to the Sucre Department.  It consists of Boquerón Island, Cabruna Island, Ceycén Island, Mangle Island, Múcura Island, Palma Island, Panda Island, Santa Cruz del Islote (English: Santa Cruz Islet, an artificial island), Tintipán Island and Maravilla Island.

Rivers of America (Disney): The Rivers of America is the name of the artificial river found in the Frontierland areas of Magic Kingdom-style Disney theme parks around the world.  The first river was built in Disneyland when the park opened in 1955.  It surrounds Tom Sawyer Island, which can be reached by rafts traveling from the Frontierland mainland.  Additionally, there are other water-based vehicles which are found on the river.  The sights along the Rivers include a Native American tribe, a burning cabin (though the cabin at Disneyland hasn't been burning for years), and various audio-animatronic wildlife.

Pirate's Lair on Tom Sawyer Island: Tom Sawyer Island is an artificial island surrounded by the Rivers of America at Disneyland, Magic Kingdom and Tokyo Disneyland.  It contains structures and caves with references to Mark Twain characters from the novel "The Adventures of Tom Sawyer", and provides interactive, climbing, and scenic opportunities.  At Disneyland in 2007, the attraction was rethemed and expanded as Pirate's Lair on Tom Sawyer Island, adding references to Disney's "Pirates of the Caribbean" film series.

Harbor Island, Seattle: Harbor Island is an artificial island in the mouth of Seattle, Washington's Duwamish River where it empties into Elliott Bay.  Built by the Puget Sound Bridge and Dredging Company, Harbor Island was completed in 1909 and was then the largest artificial island in the world, at 350 acres (1.4 km²).  Since 1912, the island has been used for commercial and industrial activities, including secondary lead smelting, shipbuilding and repair, bulk petroleum storage, metal fabrication, and containerized cargo shipping.  Warehouses, laboratories, and other buildings are located on the island.

Nanhai Pearl Artificial Island: Nanhai Pearl Artificial Island () is an artificial island under construction off the coast of Holiday Beach in Haikou Bay, Haikou, Hainan, China.  The island is owned and being developed by HNA Group.  As of April 2016, it consists of a roughly circular body of land with a bridge providing access to and from the shore.  It will ultimately become a visitor attraction with hotels.  It will eventually take the shape of a yin-yang symbol and be about 266 hectares.

Little Bakkungaan Island: Little Bakkungaan Island (Malay: "Pulau Bakungan Kecil") is a tiny, flat, tropical island surrounded by the Sulu Sea in the state of Sabah, Malaysia.  The island is the largest of the three Malaysian Turtle Islands that together comprise the Turtle Islands National Park.  It covers a land area of 8.5 hectares.  It is at the very edge of the international treaty limits separating Malaysia from the Republic of the Philippines.  Indeed, the island itself is referred to in the international border treaty concluded in 1930 between the United States (in respect of its then overseas territory, the Philippine Archipelago) and the United Kingdom (in respect of its then protectorate, the State of North Borneo).  That treaty sets the international frontier as running in a straight line between Little Bakkungaan Island and Great Bakkungaan Island.  Great Bakkungaan Island is one of the Philippine Turtle Islands and less than 2km of water separate the two islands.  This makes Little Bakkungaan Island the internationally recognised Malaysian territory that is closest to Philippine territory.  The island hosts a turtle hatchery.  The island is administered by Sabah Parks.  There are several buildings on the island used by park rangers as well as a peer.  Much of the island is surrounded by beach.

Funaafou: Funaafou or Funa'afou is an artificial island built on the reef in the Lau Lagoon off the northeast coast of Malaita Island.  Administratively, it is in the Malaita Province of the Solomon Islands.  Funa'afou island, which is near the edge of the Makwanu Passage, has about 200 inhabitants.  It is the first artificial Island built in the Lau lagoon.  According to history, the people of Baleo tribe are the first descendants of Funafou Islands

Wishes: A Magical Gathering of Disney Dreams: Wishes: A Magical Gathering of Disney Dreams was a fireworks show at the Magic Kingdom theme park of Walt Disney World.  The show debuted at the park on October 9, 2003, and was developed by Walt Disney Creative Entertainment, under the direction of VP Parades & Spectaculars, Steve Davison, who was assigned to create a replacement for the 32-year-old "Fantasy in the Sky" fireworks.  Several variations of the show at Walt Disney World include "Happy HalloWishes" during "Mickey's Not-So-Scary Halloween Party", "Holiday Wishes" during "Mickey's Very Merry Christmas Party", and "Magic, Music and Mayhem" during the 2007 event "Disney's Pirate and Princess Party".  The version at Disneyland Park in Disneyland Paris premiered on July 16, 2005 and had its final show on August 25, 2007.  The show at the Magic Kingdom was sponsored by Pandora Jewelry.  On February 9, 2017 it was announced by the Disney Parks Blog that "Wishes" would conclude its 13 year run at the Magic Kingdom.  The show was presented for the last time on May 11, 2017 at the Magic Kingdom Park and was replaced by "Happily Ever After" on May 12, 2017.

Hoffman Island: Hoffman Island is a small (11 acre; 0.045 km²) artificial island in the Lower New York Bay, off South Beach, Staten Island.  Another, smaller (4 acre; 0.016 km²) artificial island, Swinburne Island, lies immediately to the south.  Created in 1873 upon the Orchard Shoals by the addition of landfill, the island is named for former New York City mayor (1866–1868) and New York Governor (1869–1871) John Thompson Hoffman.

Kuljak Island: Kuljak Island, also known as "Black Swan Island", is an artificial island in the Swan River.  Situated between Ron Courtney Island upstream and Heirisson Island downstream, Kuljak Island is east of Maylands Peninsula and south of Garratt Road Bridge.  Kuljak Island is surrounded by a number of smaller, also artificial, islets, and is entirely within the boundaries of the suburb of Ascot.

Supporting paragraphs: Rivers of America (Disney) Pirate's Lair on Tom Sawyer Island
Answer: Tom Sawyer Island