Question: How many Batman: The Ride rollercoasters can be found in the United States?
Context: Auto Race, also known as Auto Ride, is an amusement park ride that gave children their first chance to drive a car.  It was conceived and designed by Harry Guy Traver of Traver Engineereing.  This ride features a set of electric cars traveling through a wooden trough-like track lined with metal strips used to carry the electrical current that powers the cars.  There is only one remaining Auto Race still operating which can be found at Kennywood, located in West Mifflin, Pennsylvania, near Pittsburgh in the United States. John Charles Dykstra, A.S.C. (born June 3, 1947 in Long Beach, California, United States) is an American special effects artist, pioneer in the development of the use of computers in filmmaking and recipient of three Academy Awards, among many other awards and prizes.  He was one of the original founders of Industrial Light & Magic, the special effects and computer graphics division of Lucasfilm.  He is well known as the special effects lead on the original "Star Wars", helping bring the original visuals for lightsabers, space battles between X-wings and TIE fighters, and Force powers to the screen.  He also led special effects on many other movies, including "Batman Forever", "Batman and Robin", "Stuart Little", "", "Spider-Man" and "Spider-Man 2". A helter skelter is an amusement ride with a slide built in a spiral around a high tower.  Users climb up inside the tower and slide down the outside, usually on a mat or hessian (burlap) sack.  Typically the ride will be of wooden construction and, in the case of fairground versions, designed to be disassembled to facilitate transportation between sites.  The term is primarily (but not exclusively) found in the United Kingdom.  In the United States, the ride is uncommon and may be called by other names, such as a "Skyslide". El tren de la muerte ("The Death Train") refers to a network of Mexican freight trains that are utilized by U.S.- bound migrants to more quickly traverse the length of Mexico, also known as "La Bestia" ("The Beast") and "El tren de los desconocidos" ("The train of the unknowns").  This mode of travel is extremely dangerous and illegal.  It is estimated that yearly between 400,000 and 500,000 migrants, the majority of whom are of Central American origin, continue to ride atop these trains in the effort to reach the United States.  The National Migration Service (Spanish: Instituto Nacional de Migración (INM)) reports that of 64,061 foreign nationals that were detained in the year 2009, 60,383 were from El Salvador, Guatemala, and Honduras.  Furthermore, according to the consul of El Salvador, Vilma Mendoza, "Around 30 percent of those who ride the trains are 'cyclical migrants'; men and women who attempt to return to the United States after deportation, or after a failed attempt".  Other factors that have contributed to the mass exodus of Central Americans, according to Juan Pardinas, CEO of the Mexican Institute for Competitiveness, are "the precarious economic situation of their countries of origin, the consequences of civil and political-military conflict, as well as social and economic devastation caused by natural disasters, such as hurricanes".  Although these trains (which transport products and materials including corn, cement, and minerals) are regarded as a free form of travel that allows migrants to avoid Mexico's numerous immigration checkpoints and 48 detention centers, the risks are high and many riders are left with life-altering injuries that limit their capacity to work. Batman: The Ride is a 4D Free Spin roller coaster at Six Flags Fiesta Texas amusement park in San Antonio, Texas, United States.  Manufactured by S&S - Sansei Technologies (S&S), the roller coaster is the first 4D Free Spin coaster in the world.  It opened on May 23, 2015. Batman: The Ride is a steel inverted roller coaster based thematically on the 1989 film Batman and found at seven Six Flags theme parks in the United States.  Built by consulting engineers Bolliger & Mabillard, it rises to a height of between 100 and and reaches top speeds of 50 mph .  The original roller coaster at Six Flags Great America was partially devised by the park's general manager Jim Wintrode.  Batman: The Ride was the world's first inverted roller coaster when it opened in 1992, and has since been awarded Coaster Landmark status by the American Coaster Enthusiasts.  Clones of the ride exist at amusement parks around the world. "Swag" is the 11th episode from the dramedy series "Ugly Betty".  This was supposed to be the fourth episode, which was scheduled to air on October 19, 2006, but it was replaced by "Fey's Sleigh Ride".  It has been billed as "The Lost Episode" and filled in loose ends via new scenes.  On the first season DVD, "Swag" is listed as episode 4 and all the scenes involving Betty moving her things from "MODE" (when it aired in the United States and Canada) have been removed and the scenes involving the Masked Lady were put back in.  In addition, the Betty and Christina flashback scenes were not included in the DVD.  For syndication purposes in the United States, the episode with the flashbacks are aired instead of the original scenes.  Many critics have found it to have been uncouth . Six Flags, officially Six Flags Entertainment Corporation, is an amusement park corporation based in the United States, with properties in the US, Canada, and Mexico.  It is the largest amusement park company in the world, based on the number of properties owned, and is ranked sixth in terms of attendance.  The company maintains twenty properties throughout North America including theme parks, thrill parks, water parks, and family entertainment centers.  In 2016, Six Flags properties hosted over 30.1 million guests. Ride for Refuge is a non-competitive cycling event that partners with 175+ independent charities annually and raises awareness and funds for displaced persons, the vulnerable, and the exploited.  The event occurs internationally, at locations in Canada and the United States.  Ride for Refuge was started in Canada in 2004, by the Christian missionary organization International Teams Canada.  In its first year, Ride for Refuge took place in one city, Kitchener, Ontario, and there were only 25 cyclists.  As of 2014, the Ride for Refuge has raised more than $5,000,000.00 for their charitable partners.  Teams that enter in the event can choose from a list of approved charities for whom to fundraise Teams can choose to support orphans, homeless people, refugees, human trafficking victims, and other displaced peoples.  The RIDE raises money for charities such as Ratanak International, International Justice Mission Canada, Africa Inland Mission Canada, and many more Diavlo is a steel roller coaster at Himeji Central Park in Japan which is a clone of Batman the Ride.  It is one of the first Bolliger & Mabillard roller coasters to be located outside of the United States, and the second by launch date; opening four months later than Nemesis at Alton Towers, England.
Answer: seven