Title: 1910s in film
Content:  The 1910s saw the origins of Hollywood as the centre of the American film industry relocated from New York to California. By 1912, major motion-picture companies had set up production near or in Los Angeles. In the early 1900s, most motion picture patents were held by Thomas Edison's Motion Picture Patents Company in New Jersey, and filmmakers were often sued to stop their productions. To escape this, filmmakers began moving out west, where Edison's patents could not be enforced. Also, the weather was ideal and there was quick access to various settings. Los Angeles became the capital of the film industry. During the First World War the film industries of Europe were devastated, and Hollywood replaced the French and Italian firms as the most popular film makers in the world.
Title: Hollywood
Content:  the Nestor Film Company, was established by the New Jersey-based Centaur Film Company in a roadhouse at 6121 Sunset Boulevard (the corner of Gower), in October 1911. Four major film companies – Paramount, Warner Bros., RKO, and Columbia – had studios in Hollywood, as did several minor companies and rental studios. In the 1920s, Hollywood was the fifth-largest industry in the nation. By the 1930s, Hollywood studios became fully vertically integrated, as production, distribution and exhibition was controlled by these companies, enabling Hollywood to produce 600 films per year. Hollywood became known as Tinseltown and the "dream factory" because of the glittering image of the movie industry.
Title: Hollywood
Content:  Hollywood is a neighborhood in the central region of Los Angeles, California. Its name has come to be a shorthand reference for the U.S. film industry and the people associated with it. Many of its studios such as Columbia Pictures, Disney, Paramount Pictures, Warner Bros., and Universal Pictures were founded there; Paramount still has its studios there. Hollywood was incorporated as a municipality in 1903. It was consolidated with the city of Los Angeles in 1910 and soon thereafter a prominent film industry emerged, eventually becoming the most recognizable in the world.
Title: United States
Content:   Hollywood, a northern district of Los Angeles, California, is one of the leaders in motion picture production. The world's first commercial motion picture exhibition was given in New York City in 1894, using Thomas Edison's Kinetoscope. Since the early 20th century, the U.S. film industry has largely been based in and around Hollywood, although in the 21st century an increasing number of films are not made there, and film companies have been subject to the forces of globalization. Director D. W. Griffith, an American filmmaker during the silent film period, was central to the development of film grammar, and producer/entrepreneur Walt Disney was a leader in both animated film and movie merchandising. Directors 
Title: Culture of California
Content:  California is home to Hollywood (a district of Los Angeles), the center of the American film industry, which has given rise to the popular fashion movie-star image and stereotypical life styles such as beach-dwelling surfers. Hollywood has had a profound effect on culture all across the world since the early 20th century. During the so-called Golden Age of Hollywood, which lasted from the end of the silent era in American cinema in the late 1920s to the late 1950s, thousands of movies were released from Hollywood studios. Spectacular epics, which took advantage of new widescreen processes from the 1950s, have become increasingly popular. Today, in spite of fierce competition from other countries and even other states within the US, California still dominates the industry.
Title: History of the United Kingdom
Content:  The British film industry emerged in the 1890s when cinemas in general broke through in the western world, and built heavily on the strong reputation of the London legitimate theatre for actors, directors and producers. The problem was that the American market was so much larger and richer. It bought up the top talent, especially when Hollywood came to the fore in the 1920s and produced over 80 percent of the total world output. Efforts to fight back were futile—the government set a quota for British made films, but it failed. Hollywood furthermore dominated the lucrative Canadian and Australian markets. Bollywood (based in Bombay) dominated the huge Indian market. The most prominent directors remaining in London were Alexander Korda, an expatriate Hungarian, and Alfred Hitchcock. There was a revival of 
Title: History of California (1900–present)
Content:  The first decades of the twentieth century saw the rise of the film studio system. MGM, Universal and Warner Brothers all acquired land in Hollywood, which was then a small subdivision known as "Hollywoodland" on the outskirts of Los Angeles. The enormous variety in terrain and the year-round sunshine made filmmaking easier and cheaper, and actors, producers, financiers and craftsmen headed to Hollywood. The movies made California even better known, attracting hundreds of thousands of migrants, especially from the Midwest, who loved the mild Mediterranean climate, cheap land, and new jobs. By the 1930s, Hollywood had extended its reach into radio, and by 1950 southern California had also become a major center of television production, hosting studios for major networks such as NBC and CBS.
Title: History of Los Angeles
Content:  Hollywood has been synonymous worldwide with the film industry for over a hundred years. It was incorporated as the City of Hollywood in 1903 but merged into LA in 1910. In the 1900s movie makers from New York found the sunny, temperate weather more suitable for year-round location shooting. It boomed into the cinematic heart of the United States, and has been the home and workplace of actors, directors and singers that range from small and independent to world-famous, leading to the development of related television and music industries. 
Title: Monroe Doctrine Centennial half dollar
Content:  By 1922, the Hollywood film industry was in serious trouble. Established in the Los Angeles area during the 1910s after moving from such eastern venues as Fort Lee, New Jersey, the industry had been rocked by a number of scandals. These included the mysterious shooting death of film director William Desmond Taylor, and the subsequent evasive testimony concerning it by actress Mabel Normand, which helped destroy her career. Another notorious scandal of the early 1920s was the death of actress Virginia Rappe following an orgy at a San Francisco hotel. Actor Roscoe "Fatty" Arbuckle was, after three trials, acquitted of manslaughter, but the negative publicity 
Title: Film industry
Content:   The cinema of the United States, often generally referred to as Hollywood, has had a profound effect on cinema across the world since the early 20th century. The United States cinema (Hollywood) is the oldest film industry in the world and also the largest film industry in terms of revenue. Hollywood is the primary nexus of the U.S. film industry with established film study facilities such as the American Film Institute, LA Film School and NYFA being established in the area. However, four of the six major film studios are owned by East Coast companies. The major film studios of Hollywood 

Question: when did hollywood become the centre of the film industry?
Answer: 1912.
By 1912.