Question: So Long, Scarecrow is titled in reference to which 1939 musical fantasy film?
Context: Willy Wonka & the Chocolate Factory is a 1971 American musical fantasy film directed by Mel Stuart, and starring Gene Wilder as Willy Wonka.  It is an adaptation of the 1964 novel "Charlie and the Chocolate Factory" by Roald Dahl.  Dahl was credited with writing the film's screenplay; however, David Seltzer, who went uncredited in the film, was brought in to re-work Dahl's screenplay against his wishes, making major changes to the ending and adding musical numbers.  These changes and other decisions made by the director led Dahl to disown the film. Into the Woods is a 2014 American musical fantasy film directed by Rob Marshall, and adapted to the screen by James Lapine from his and Stephen Sondheim's Broadway musical of the same name.  A Walt Disney Pictures production, it features an ensemble cast that includes Meryl Streep, Emily Blunt, James Corden, Anna Kendrick, Chris Pine, Tracey Ullman, Christine Baranski, Lilla Crawford, Daniel Huttlestone, MacKenzie Mauzy, Billy Magnussen, and Johnny Depp.  Inspired by the Grimm Brothers' fairy tales of "Little Red Riding Hood", "Cinderella", "Jack and the Beanstalk", and "Rapunzel", the film is a fantasy genre centered on a childless couple, who set out to end a curse placed on them by a vengeful witch.  Ultimately, the characters are forced to rectify the consequences of their actions. The Scarecrow is a 2000 animated musical fantasy film, written and directed by Brian Nissen and Richard Rich, and based on the Nathaniel Hawthorne short story "Feathertop" and the Percy MacKaye play "The Scarecrow".  It features the voices of Corey Feldman and Belinda Montgomery. The songs from the 1939 musical fantasy film "The Wizard of Oz" have taken their place among the most famous and instantly recognizable American songs of all time, and the film's principal song, "Over the Rainbow", is perhaps the most famous song ever written for a film.  Music and lyrics were by Harold Arlen and E.Y. "Yip" Harburg, who won an Academy Award for Best Song for "Over the Rainbow". The Wizard of Oz is a 1939 American musical fantasy film produced by Metro-Goldwyn-Mayer.  Widely considered to be one of the greatest films in American history, it is the best-known and most commercially successful adaptation of L. Frank Baum's 1900 children's book, "The Wonderful Wizard of Oz."  It stars Judy Garland as Dorothy Gale, alongside Ray Bolger, Jack Haley, Bert Lahr, Frank Morgan, Billie Burke and Margaret Hamilton, with Charley Grapewin, Pat Walshe and Clara Blandick, Terry (billed as Toto), and the Singer Midgets as the Munchkins. The Wonderful Wizard of Oz ( ) is an American children's novel written by author L. Frank Baum and illustrated by W. W. Denslow, originally published by the George M. Hill Company in Chicago on May 17, 1900.  It has since been reprinted on numerous occasions, most often under the title The Wizard of Oz, which is the title of the popular 1902 Broadway musical adaptation as well as the iconic 1939 musical film adaptation. Gonks Go Beat is a 1965 British science fiction / musical fantasy film, directed by Robert Hartford-Davis.  It stars Kenneth Connor and Frank Thornton.  "Gonks Go Beat" is loosely based on the "Romeo and Juliet" storyline and features 16 musical numbers performed by a variety of artists, including Lulu and the Luvvers, The Nashville Teens and members of the Graham Bond Organisation including Ginger Baker, Jack Bruce and Dick Heckstall-Smith.  Other musical contributors were – and remained – obscure.  The film includes an early appearance by the actor Derek Thompson performing with his twin sister Elaine (credited as Elain). Xanadu is a 1980 American romantic musical fantasy film written by Richard Christian Danus and Marc Reid Rubel and directed by Robert Greenwald.  The title is a reference to the nightclub in the film, which takes its name from Xanadu, the summer capital of Kublai Khan's Yuan Dynasty in China.  This city appears in "Kubla Khan" by Samuel Taylor Coleridge, a poem that is quoted in the film.  The film's plot was inspired by the 1947 film "Down to Earth". MGM's 1939 musical fantasy film "The Wizard of Oz" was first shown in theatres that year, then re-released nationwide in 1949 and again in 1955.  It was first broadcast on television on Saturday, November 3, 1956.  The film was shown as the last installment of the CBS anthology series "Ford Star Jubilee".  Since that telecast, it has been shown respectively by CBS, NBC, the WB Network, and several of Ted Turner's national cable channels.  It has never been licensed to any local affiliate broadcast TV station.  From 1959 until 1991, it was an annual tradition on American commercial network television.  During these years, and for several afterwards, it was always shown as a television special. So Long, Scarecrow is the second album by the rock band Scarling.  Written and recorded in early 2005, and released on October 25, 2005, it is the first Scarling.  album to feature drummer Beth Gordon.  Its title is a reference to "The Wizard of Oz": in lead vocalist Jessicka's view, the film's Scarecrow is a metaphor for the band itself; the character's initial lack of and search for a brain, she explains, parallels Scarling. 's search for new territory in a predictable and monotonous musical environment.
Answer: The Wizard of Oz