Question: What year did a Gold Diggers of 1933 actress, Ruby Keeler, make a comeback on Broadway in? 

Context paragraphs:
The Gold Diggers (1919 play): The Gold Diggers is a play written by Avery Hopwood.  It popularized the use of the term "gold digger" to refer to women who seek wealthy partners, as opposed to the earlier usage referring to gold miners. Producer David Belasco staged it on Broadway in 1919, with Ina Claire in the lead role.  It was a hit, running for two consecutive seasons before going on tour.

Ruby Keeler: Ethel Ruby Keeler (August 25, 1909 – February 28, 1993) billed professionally as Ruby Keeler, was a Canadian-born American actress, dancer and singer most famous for her on-screen coupling with Dick Powell in a string of successful early musicals at Warner Brothers, particularly "42nd Street" (1933).  From 1928 to 1940, she was married to actor and singer Al Jolson.  She retired from show business in the 1940s, but made a widely publicized comeback on Broadway in 1971.

Painting the Clouds with Sunshine: "Painting the Clouds with Sunshine" is a popular song published in 1929.  The music was written by Joe Burke and the lyrics by Al Dubin for the 1929 musical film "Gold Diggers of Broadway".  "Gold Diggers of Broadway" is a partially lost film, and the scene featuring the song is one of the only surviving scenes of the film.

Painting the Clouds with Sunshine (film): Painting the Clouds with Sunshine is the title of a Technicolor musical film released in 1951, directed by David Butler and starring Dennis Morgan and Virginia Mayo (singing voice was dubbed by Bonnie Lou Williams).  The film is a musical adaptation of the 1919 play "The Gold Diggers" by Avery Hopwood.  It is the fourth film adaptation of the play, after "The Gold Diggers" (1923), "Gold Diggers of Broadway" (1929) and "Gold Diggers of 1933" (1933).  The film features two songs from "Gold Diggers of Broadway": the title song and "Tiptoe Through the Tulips"; as well as a song from "Gold Diggers of 1933", "We're in the Money".

The Gold Diggers' Song (We're in the Money): "The Gold Diggers' Song (We're in the Money)" is a song from the 1933 Warner Bros. film "Gold Diggers of 1933", sung in the opening sequence by Ginger Rogers and chorus.  The lyrics were written by Al Dubin and the music by Harry Warren.  It became a standard and its melody is well known.

Liza (All the Clouds'll Roll Away): "Liza (All the Clouds'll Roll Away)" is a song composed by George Gershwin with lyrics by Ira Gershwin and Gus Kahn.  It was introduced in 1929 by Ruby Keeler (as Dixie Dugan) in Florenz Ziegfeld's musical "Show Girl".  The stage performances were accompanied by the Duke Ellington Orchestra.  On the show's opening night in Boston on June 25, 1929, Keeler's husband and popular singer Al Jolson suddenly stood up from his seat in the third row and sang a chorus of the song, much to the surprise of the audience and Gershwin himself.  Jolson recorded the song a few days later on July 6, 1929, and his rendition rose to number nine on the charts of the day.

42nd Street (song): 42nd Street is the title song from the 1933 Warner Bros. backstage musical film "42nd Street", with music by Harry Warren and lyrics by Al Dubin.  The song was published in 1932.  It is the finale of the film, where it was sung by Ruby Keeler, Dick Powell and ensemble.  It was used again in 1980 when the film was adapted as a long-running Broadway musical.  In 2004 the song placed #97 in AFI's 100 Years...100 Songs survey of the top tunes in American cinema.

Gold Diggers of 1933: Gold Diggers of 1933 is a pre-Code Warner Bros. musical film directed by Mervyn LeRoy with songs by Harry Warren (music) and Al Dubin (lyrics), staged and choreographed by Busby Berkeley.  It stars Warren William, Joan Blondell, Aline MacMahon, Ruby Keeler, and Dick Powell, and features Guy Kibbee, Ned Sparks and Ginger Rogers.

The Gold Diggers (1923 film): The Gold Diggers is a lost Warner Bros. silent film directed by Harry Beaumont with screenplay by Grant Carpenter based on the play "The Gold Diggers" by Avery Hopwood which ran for 282 performances on Broadway in 1919 and 1920.  Both the play and the film were produced by David Belasco.  The film stars Hope Hampton, Wyndham Standing, and Louise Fazenda.  It was also the (uncredited) film debut of Louise Beavers.

Robert McWade: Robert McWade (January 25, 1872 – January 19, 1938), was an American stage and film actor.  From 1903 to 1927, he appeared in at least 38 Broadway productions, his last being "The Devil In The Cheese", with Bela Lugosi and Fredric March.  McWade also appeared in 83 films between 1924 and 1938, for example "42nd Street" with Dick Powell and Ruby Keeler (1933).  His father was notable stage actor Robert McWade Sr. (1835–1913) and his older brother was character actor Edward McWade.

Supporting paragraphs: Gold Diggers of 1933 Ruby Keeler
Answer: 1971