Question: When the View-Master was the official film of Disneyland in the 1970s, an actor whose career spanned how many decades was its spokesman?

full_context: Document 1: Giovanola: Giovanola Freres SA was one of the prominent thrill ride manufacturers in the world. It was well known for thrill rides and also built electrical power stations, water storage tanks, pipelines, highway bridges, and many other steel products. The company started out as a small metal forging shop, founded by Joseph Giovanola in 1888. It served as a subcontractor to Intamin supplying rides and roller coasters. In 1998 Giovanola started marketing directly under the name Giovanola Amusement Rides Worldwide. The company was based in Monthey, Switzerland. During its last years in business, Giovanola fashioned steel behind the scenes for companies such as Intamin and Bolliger & Mabillard. The company also built its own thrill rides and roller coasters from 1998 to 2001. Examples of Giovanola roller coasters are Goliath at Six Flags Magic Mountain, Titan at Six Flags Over Texas and Anaconda at South Africa's Gold Reef City.
Document 2: General Aeroplane Company: The General Aeroplane Company was Detroit's first commercial airplane builder. GAC built three types of aircraft during the First World War and operated a flying school. The aircraft were the Verville Flying Boat, the Gamma S biplane with floats (floatplane), and the Gamma L biplane with wheels. All had engine installations driving pusher propellers.
Document 3: Jamieson Film Company: The Jamieson Film Company, a Texas film production company, was one of the crucial players in the emergence of Dallas as a center for commercial film production in the U.S. Founded by Hugh Jamieson in 1916, the Jamieson Film Company is perhaps most widely remembered for producing the first copies of the Abraham Zapruder film that captured the assassination of JFK. However, the Company’s involvement with the Zapruder film represents just a single episode in over a half-century in the film processing and production business. During its lifespan, the Jamieson Film Company produced industrial films, television programs and advertisements for clients across Texas and the U.S., patented film processing equipment, and became a training ground for many individuals in the Texas film industry.
Document 4: John Forsythe: John Forsythe (born either John Lincoln Freund or Jacob Lincoln Freund; January 29, 1918 – April 1, 2010) was an American stage, film/television actor, producer, narrator, drama teacher and philanthropist whose career spanned six decades. He also appeared as a guest on several talk and variety shows and as a panelist on numerous game shows.
Document 5: Henry Fonda: Henry Jaynes Fonda (May 16, 1905 – August 12, 1982) was an American film and stage actor with a career spanning five decades.
Document 6: Jane Fonda: Jane Fonda (born Jayne Seymour Fonda; December 21, 1937) is an American actress, writer, political activist, former fashion model and fitness guru. She is a two-time Academy Award winner and two time BAFTA Award winner. In 2014, she was the recipient of the American Film Institute AFI Life Achievement Award.
Document 7: Ansco: Ansco was the brand name of a photographic company based in Binghamton, New York, which produced photographic films, papers and cameras from the mid-1800s until the 1980s. In the Late 1880s ANSCO's predecessor, Anthony and Scovill, bought the Goodwin Camera & Film Company. Hannibal Goodwin invented the flexible photographic film, which should have made Anthony Scovill the leader in the amateur photography business. But George Eastman copied the patented process and immediately set out to compete against Anthony Scovill. The ruthless behavior of Eastman nearly drove the now named ANSCO out of business, but a settlement in 1905 saved the company from bankruptcy. Eastman Kodak got away cheaply on this legal proceeding. In 1928 AGFA merged with ANSCO to allow it to compete in the worldwide photographic market like its competitors, Kodak and Zeiss. This joint company added many AGFA cameras and accessories to its sales in the USA as a result of this. In the months after the bombing of Pearl Harbor, the US Government seized AGFA-ANSCO. This now government-run business continued to survive as a hostile alien property (under government control into the 1960s). During this period, the organization was renamed GAF (General Aniline & Film Corporation). Throughout the postwar period the concern sold rebadged versions of cameras made by other manufacturers, including Agfa and Chinon. A Minolta-built Ansco model was the first 35 mm camera in space and their film was used in space, too.
Document 8: GAF Materials Corporation: GAF is a company based in Parsippany, New Jersey, that has roots dating back to the late 19th century. The GAF acronym stands for General Aniline & Film. The company has historically been primarily focused on manufacturing of roofing materials for residential and commercial applications. At one time GAF was also active in manufacturing photographic film as well as cameras and projectors (both still and motion picture), and was the manufacturer of the View-Master, the famous line of 3D transparencies, viewers and projectors. Briefly in the 1970s, it was the official film of Disneyland and at this time, actor Henry Fonda served as the company's spokesman in several television commercials including one that featured Jodie Foster in her first acting role.
Document 9: Frances Ford Seymour: Frances Ford Seymour (April 14, 1908 – April 14, 1950) was a Canadian-born American socialite, the second wife of actor Henry Fonda, and the mother of actors Jane Fonda and Peter Fonda.
Document 10: Dana Andrews: Carver Dana Andrews (January 1, 1909 – December 17, 1992) was an American film actor and a major Hollywood star during the 1940s. He continued acting in less prestigious roles into the 1980s. The role for which he received the most praise, was as war veteran Fred Derry in "The Best Years of Our Lives" (1946).
Document 11: Peter Fonda: Peter Henry Fonda (born February 23, 1940) is an American actor. He is the son of Henry Fonda, younger brother of Jane Fonda, and father of Bridget and Justin Fonda (by first wife Susan Brewer, stepdaughter of Noah Dietrich). Fonda is an icon of the counterculture of the 1960s.
Document 12: Galpin Auto Sports: Galpin Auto Sports (or GAS) is an American automobile dealership and automobile repair shop located in Van Nuys which specializes in customizing and remodeling vehicles specifically for their drivers. They also provide spare parts. The shop was founded in 1946 by Frank Galpin and later purchased by Bert Boeckmann.
Document 13: James Stewart: James Maitland "Jimmy" Stewart (May 20, 1908July 2, 1997) was an American actor and military officer who is among the most honored and popular stars in film history. A major Metro-Goldwyn-Mayer contract player, Stewart was known for his distinctive drawl and down-to-earth persona, which helped him often portray American middle-class men struggling in crisis. Many of the films he starred in have become enduring classics.
Document 14: The Oz Film Manufacturing Company: The Oz Film Manufacturing Company was a short-lived independent film studio from 1914 to 1915. It was founded by L. Frank Baum (president), Louis F. Gottschalk (vice president), Harry Marston Haldeman (secretary), and Clarence R. Rundel (treasurer) as an offshoot of Haldeman's social group, The Uplifters, that met at the Los Angeles Athletic Club. Its goal was to produce quality family-oriented entertainment in a time when children were primarily seeing violent Westerns. It was a critical but not a commercial success; even under a name change to Dramatic Feature Films, it was quickly forced to fold. The studio made only five features and five short films, of which four features (in part) and no shorts survive. Founded in 1914, It was absorbed by Metro Pictures, which evolved into Metro-Goldwyn-Mayer.
Document 15: The Genie Company: The Genie Company is a manufacturer of garage door openers & related accessories. It was founded in 1923 as the Alliance Manufacturing Company. At the time the company produced a broad line of consumer, industrial and military products. In May 1954, the Alliance Manufacturing Company first produced its own garage door opener and called it Genie. In 1983 the company entered the home and shop vacuum market, and in 1985 it changed its name to Genie Home Products. Overhead Door Corporation purchased the company in 1994. The Genie Company is headquartered in Mt. Hope, Ohio. The company distributes its openers & accessories through professional dealers and retailers throughout the United States and Canada. The company President is Mike Kridel.
ground_truth: five