Question: Intimidator 305 and Thunder Dolphin are what type of roller coaster?

Context paragraphs:
Leviathan (roller coaster): Leviathan is a steel roller coaster in the Medieval Faire section of the park at Canada's Wonderland in Vaughan, Ontario, Canada.  It is the first roller coaster designed by Swiss firm Bolliger & Mabillard to exceed a height of 300 ft , putting it in a class of roller coasters commonly referred to as "giga".  At 5486 ft long, 306 ft tall, and with a top speed of 92 mph , Leviathan is the tallest and fastest roller coaster in Canada.  s of 2015 , Leviathan is ranked as the eighth-tallest, and the eighth-fastest roller coaster in the world, and the third-tallest traditional lift-style coaster in the world.  It was the 16th roller coaster to be built at Canada's Wonderland, and the ride's track was completed in February 2012, with the first test run being completed on 15 March 2012.  The coaster opened to season pass holders on 27 April 2012, and to the general public on 6 May 2012.

Intimidator (roller coaster): Intimidator is a steel roller coaster built by Bolliger & Mabillard at Carowinds.  The roller coaster is located in the Celebration Plaza section of the park on the former site of the Wild Thornberry's River Adventure log flume ride.  Intimidator is the thirteenth roller coaster installed at Carowinds and is located near the entrance of the theme park.  It is currently one of the tallest, fastest and longest roller coasters in the Southeast with a 232 ft lift hill, a top speed of 75 mph and a track length of 5316 ft .  It was announced on August 26, 2009 and opened March 27, 2010.  The roller coaster's name comes from the nickname of NASCAR driver Dale Earnhardt.

White Cyclone: White Cyclone (ホワイトサイクロン , Howaito Saikuron ) is a wooden roller coaster at Nagashima Spa Land in Mie Prefecture, Japan.  At 1700 m in length, White Cyclone is the third longest wooden roller coaster in the world, and is the longest wooden roller coaster outside of the United States.  Despite its length, White Cyclone is still considerably shorter than the 2479 m Steel Dragon 2000, the world's longest steel roller coaster, which is also at Nagashima Spa Land.  In addition to being the third longest wooden roller coaster, White Cyclone is the seventh tallest wooden roller coaster in the world and the fourth tallest wooden roller coaster outside the United States.  A single ride on the White Cyclone costs ¥1,000 (approximately $9 USD), and the ride is restricted to those individuals above 1.3 m in height; and those individuals under 54 years of age.

Wooden Roller Coaster (Playland): The Wooden Roller Coaster (formerly Coaster) is a wooden roller coaster at Playland in Vancouver, British Columbia, Canada.  Opened in 1958, it is the oldest roller coaster in Canada.  The ride is 2840 ft long—which established it as the largest roller coaster in Canada at the time it was completed—and has a height of 68 ft and speeds of up to 76 km/h .  The coaster was awarded the Coaster Classic and Roller Coaster Landmark statuses by American Coaster Enthusiasts.

Maverick (roller coaster): Maverick is a steel roller coaster built by Intamin at Cedar Point in Sandusky, Ohio, United States.  It was the seventeenth roller coaster built at the park since Blue Streak in 1964.  It is notable as being the 500th roller coaster designed by German engineer Werner Stengel and the first roller coaster featuring a Twisted Horseshoe Roll.  Maverick's US$21-million price tag makes it Cedar Point's fourth most expensive roller coaster, behind Millennium Force, Top Thrill Dragster, and GateKeeper.  The 4450 ft course makes it the fourth longest roller coaster at Cedar Point.

Corkscrew (Valleyfair): Corkscrew is the name of a roller coaster at Valleyfair in Shakopee, Minnesota featuring one vertical loop and two corkscrews.  Built in 1980, Corkscrew was planned to reflect the design of its sister roller coaster Corkscrew at Cedar Point.  It is notably one of the first roller coasters to feature a double corkscrew, as well as a vertical loop.  The main differences that the Valleyfair model has is the addition of a finale helix and the omission of the camelback before the loop.  Until the hypercoaster Wild Thing (the fifth highest and fastest roller coaster in the world at the time it opened in 1996), Corkscrew was the only outdoor all-steel roller coaster in Minnesota.  Corkscrew is currently the only roller coaster at Valleyfair with inversions.  The coaster's track was painted blue when it open in 1980 but was repainted orange and yellow in 2011.

Thunder Dolphin: Thunder Dolphin (サンダードルフィン ) is a steel roller coaster at the Tokyo Dome City Attractions amusement park, which is part of Tokyo Dome City in Tokyo, Japan.  The ride was designed and constructed by Intamin.  At 80 m tall, Thunder Dolphin is currently the 8th tallest continuous circuit roller coaster in the world, behind Kingda Ka, Top Thrill Dragster, Fury 325, Steel Dragon 2000, Millennium Force, Leviathan, and Intimidator 305.  Following an incident in which a 25 cm long bolt fell from the ride while in motion on 5 December 2010, injuring a 9-year-old visitor, operation of the ride was suspended until 1 August 2013, when the ride reopened.

Tokyo Dome City Attractions: Tokyo Dome City Attractions (東京ドームシティアトラクションズ ) is an amusement park located next to the Tokyo Dome in Bunkyō, Tokyo, Japan, and forms a part of the Tokyo Dome City entertainment complex.  It opened in 1958, and was formerly known as Kōrakuen (後楽園ゆうえんち ) until April 2003.  It was one of the most popular amusement parks in Tokyo.  Rides include the "Big O" Ferris wheel and "Thunder Dolphin" roller coaster.

Intimidator 305: Intimidator 305 is a steel roller coaster located at Kings Dominion in Doswell, Virginia, United States.  Manufactured by Intamin, Intimidator 305 opened to the public on April 2, 2010, as the park's fourteenth roller coaster.  The roller coaster is located in the Safari Village section of the park near Anaconda on the former site of the Safari Monorail ride.  Standing at 305 ft tall and reaching speeds of 90 mph , it is the second Giga Coaster to be built in North America – the first was Millennium Force at Cedar Point.  The $25 million investment was the largest of any ride in the park's history.  It is named and themed after NASCAR driver Dale Earnhardt, who was also known as the "Intimidator."

Cyclone (Revere Beach): The Cyclone was a wooden roller coaster that operated at Revere Beach in Revere, Massachusetts, from 1925 until 1969.  When Cyclone was constructed, it was the tallest roller coaster ever built, as well as being the first roller coaster in the world to reach 100 ft in height.  In addition to being the tallest roller coaster of its day, some also claim that it was the largest and fastest roller coaster in the world, with a length of 3600 ft and top speeds between 45 and 50 mph (some dispute the speed record claim and instead award that honor to the Giant Dipper).  Cyclone held the title of world's tallest roller coaster until 1964 when it was surpassed by Montaña Rusa at La Feria Chapultepec Mágico in Mexico City, Mexico.

Supporting paragraphs: Thunder Dolphin Intimidator 305
Answer: steel roller coaster