Question: What Design Engineer who works at Ride Centerline LLC designed a roller coaster that operates at Six Flags Magic Mountain in Valencia, California?

full_context: Document 1: Viper (Six Flags Magic Mountain): Viper is a steel roller coaster made by Arrow Dynamics of the United States. The roller coaster is located in the Baja Ridge area of Six Flags Magic Mountain in Valencia, California. Viper is the last of the three 7-looper roller coasters built by Arrow Dynamics to remain operating. The other two, Shockwave at Six Flags Great America and the Great American Scream Machine at Six Flags Great Adventure, were demolished in 2002 and 2010, respectively. The roller coaster replaced a HUSS ride type named Condor.
Document 2: Phantom's Revenge: Phantom's Revenge (formerly known as Steel Phantom) is a steel roller coaster at Kennywood. When it opened in 1991, it was the fastest roller coaster and had the longest drop of any roller coaster in the world. The ride was originally manufactured by Arrow Dynamics. After the 2000 season, D.H. Morgan Manufacturing was brought in to renovate the ride, most notably to remove the four inversions. Unlike most roller coasters, the ride's second drop through Thunderbolt's structure is longer than its first drop.
Document 3: 4th Dimension roller coaster: A 4th Dimension Roller Coaster is a type of steel roller coaster whereby riders are rotated independently of the orientation of the track, generally about a horizontal axis that is perpendicular to the track. The cars do not necessarily need to be fixed to an angle.
Document 4: Rotor (ride): The Rotor is an amusement park ride, designed by German engineer Ernst Hoffmeister in the late 1940s. The ride was first demonstrated at Oktoberfest 1949, and was exhibited at fairs and events throughout Europe during the 1950s and 1960s. The ride still appears in numerous amusement parks, although travelling variants have been surpassed by the Gravitron.
Document 5: The New Revolution (roller coaster): The New Revolution (formerly known as Revolution, Great American Revolution, and La Revolución) is a steel roller coaster located at Six Flags Magic Mountain in Valencia, California. Manufactured by Anton Schwarzkopf and designed by Werner Stengel, the roller coaster opened to the public on May 8, 1976. The New Revolution is the world's first modern roller coaster to feature a vertical loop and has been recognized for that accomplishment by American Coaster Enthusiasts (ACE), who awarded the roller coaster its Coaster Landmark status.
Document 6: Alpine Sleigh Ride: The Alpine Sleigh Ride was a dark ride located in the Alpine Valley section of AstroWorld in Houston, Texas. It was one of the original attractions of the park and operated from 1968 until the end of the 1983 operating season. Featuring a ride control system and vehicles (ArrowGlide) designed by Arrow Dynamics, the attraction's initial concept and design was by amusement park planner and architect Randall Duell. Duell’s company had been hired by Judge Roy Hofheinz to plan AstroWorld. The attraction took riders through an alpine themed forest before reaching the show building which was designed to resemble a large mountain capped with snow.
Document 7: Corkscrew (Alton Towers): Corkscrew was a steel roller coaster manufactured by Dutch company Vekoma to a design by Arrow Dynamics. The coaster was located in the Ug Land area of Alton Towers in Staffordshire, England. It was the park's oldest ride and is considered the greatest factor in promoting the new theme park to the British public. It was one of the first double-inverting coasters in Europe (the first in the UK), so it received much publicity and avid popularity in the 1980s. Waiting times for the ride frequently reached 6–9 hours during the first few months of operation at Alton Towers, and the park would often be forced to close early as it found itself swamped with visitors long before the evening ever came.
Document 8: Submission (Alton Towers): Submission was a Chance Rides Double Swinging Inverter located in the X-Sector area and was built in 2001. From 2005, the ride only operated one of its arms to save electricity and the ride's cycles were shortened. The slogan used in advertisement was 'Hang in there'. Following the area's theme, the ride was painted blue and was covered in a shiny metal, most likely steel. Each of its two arms had a counterweight in the shape of two metal spikes, which would sweep near to the ground like a scythe. The sequence was always the same, different to some other weight based rides that have numerous sequences, this was also probably to be more energy efficient. The Ride type itself is a rare flat-ride and not seen at a lot of themeparks, Submission did not have the best of reviews at Alton Towers mainly due to it having the same sequence (unlike others such as Ripsaw), the restraints were very similar to those on a Huss Top Spinner making it fairly uncomfortable to ride when inverted, breakdowns occasionally happened and as a result, queues were very short. In 2013 it was later revealed that Submission would be closed after the end of the 2013 season by which there is a vacant grass area where it once stood next to the break-block section on Oblivion. The grass area is often referred to as the 'Submission memorial ground' by thrill-seekers which has become a popular sitting area in the park section.
Document 9: Zierer: Zierer Karussell- und Spezialmaschinenbau GmbH & Co. KG (Short name: Zierer) is a German company located close to Deggendorf. Zierer manufactures Tivoli and Force line of roller coasters, as well as panoramic wheels, wave swingers, flying carpets, "Hexentanz" and "Kontiki" rides. The company also has partnered with Schwarzkopf to build "Lisebergbanan" at Liseberg and "Knightmare" at Camelot Theme Park.
Document 10: X2 (roller coaster): X2 (formerly known as X) is a steel roller coaster operating at Six Flags Magic Mountain in Valencia, California. It is the world's first 4th Dimension roller coaster and was the final roller coaster conceived and installed by ride manufacturer Arrow Dynamics. The ride is unique in that the trains' seats pitch 360 degrees forwards and in reverse independent of the main chassis. The coaster initially opened to the public on January 12, 2002; numerous malfunctions delayed it from debuting in 2001 as was originally anticipated. On December 2, 2007, the ride closed for its transformation into X2. It was completely repainted, received new third generation vehicles, and featured new special effects including a sound system and a pair of flame throwers. The ride reopened on May 24, 2008, following the upgrades.
Document 11: Alan Schilke: Alan Schilke is an engineer and roller coaster designer based in Hayden, Idaho, United States. He first made his mark on the industry by designing the 4th Dimension roller coaster, X, while working with Arrow Dynamics. Schilke now works as a Design Engineer at Ride Centerline LLC.
Document 12: Bayern Kurve: The Bayern Kurve is an amusement ride made in both a portable and park model that debuted in 1965 and was invented by German engineer Anton Schwarzkopf. During the ride, riders sit in one of the sixteen bobsled-themed cars that travel at a high-speed around a circular single-hilled track. Riders start in an upright position and as the cars pick up speed, they tilt inward toward the center of the ride. This ride is also known for its loud horn which is similar to that of a diesel train engine that blasts its loud roar when the ride reaches maximum speed. Also akin to a train, the seamed track creates the same rail "click-clack" railway sound, particularly at the lower section of track in the front. Additionally, the ride has a distinct whine that increases with speed due to its tire/blade drive.
Document 13: 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.
Document 14: Magnum XL-200: Magnum XL-200, colloquially known as simply Magnum, is a steel roller coaster built by Arrow Dynamics at Cedar Point in Sandusky, Ohio. When built in 1989, it was the tallest, fastest, and steepest complete-circuit roller coaster in the world as well as the first hypercoaster – a roller coaster that exceeds 200 ft in height. Some have credited Magnum with starting a period in the industry known as the "roller coaster wars", in which amusement parks competed with one another at a rapid pace to build the next tallest and fastest roller coaster. More than 40 million people had ridden Magnum as of 2009.
Document 15: Roller coaster: A roller coaster is a type of amusement ride that employs a form of elevated railroad track designed with tight turns, steep slopes, and sometimes inversions. People ride along the track in open cars, and the rides are often found in amusement parks and theme parks around the world. LaMarcus Adna Thompson obtained one of the first known patents for a roller coaster design in 1885, related to the Switchback Railway that opened a year earlier at Coney Island.<ref>
ground_truth: Alan Schilke