Please answer the following question: Information: - Skywalker Sound is the sound effects , sound editing , sound design , sound mixing and music recording division of George Lucas ' Lucas Digital motion picture group . Its main facilities are located at Skywalker Ranch in Lucas Valley , near Nicasio , California . It began as Sprocket Systems in San Anselmo , California and its name officially changed to Skywalker Sound in 1987 after the company moved to Skywalker Ranch . While located in San Anselmo , Sprocket Systems came into contact with the local residents from time to time . For instance , Kentfield resident Pat Welsh was ' discovered ' while shopping at a camera store and went on to provide the voice for E.T. . During the sound recording of Raiders of the Lost Ark , Harrison Ford could be spied practicing his bullwhip technique in the parking lot . Sprocket Systems moved from San Anselmo following a disastrous flood in January 1982 . Its staff of sound designers and re-recording mixers have either won or been nominated for the Academy Award for Best Sound and Best Sound Editing every year since Star Wars in 1977 ( in that year Ben Burtt was given a Special Achievement Award , since the category for Sound Editing had not yet been established ) . Mixing stages , editorial services and scoring stages are all located in a central ' Tech Building ' , with dining areas and living quarters in the vicinity but separate from the main work area . - Lucasfilm Ltd. LLC is an American film and television production company based in the Letterman Digital Arts Center in San Francisco, California. The studio is best known for creating and producing the "Star Wars" and "Indiana Jones" franchises, as well as its leadership in developing special effects, sound and computer animation for film. Lucasfilm was founded by filmmaker George Lucas in 1971 in San Rafael, California; most of the company's operations were moved to San Francisco in 2005. The Walt Disney Company acquired Lucasfilm in 2012 at a valuation of $4.06 billion. - The Walt Disney Company, commonly known as Disney, is an American diversified multinational mass media and entertainment conglomerate headquartered at the Walt Disney Studios in Burbank, California. It is the world's second largest media conglomerate in terms of revenue, after Comcast. Disney was founded on October 16, 1923, by brothers Walt Disney and Roy O. Disney as the Disney Brothers Cartoon Studio, and established itself as a leader in the American animation industry before diversifying into live-action film production, television, and theme parks. The company also operated under the names The Walt Disney Studio, then Walt Disney Productions. Taking on its current name in 1986, it expanded its existing operations and also started divisions focused upon theater, radio, music, publishing, and online media. - George Walton Lucas Jr. (born May 14, 1944) is an American filmmaker and entrepreneur. He is best known as the creator of the "Star Wars" and "Indiana Jones" franchises, as well as the founder of Lucasfilm and Industrial Light & Magic. He was the Chairman and Chief Executive Officer (CEO) of Lucasfilm, before selling it to The Walt Disney Company in 2012. What is the relationship between 'skywalker sound' and 'lucasfilm'?
A:
parent company