Question: The Entertainer references what other song, released in 1973?

"Westside Story" is the debut single by American rapper and West Coast hip hop artist the Game.  The song was produced by both Dr. Dre and Scott Storch, and was co-written by Mike Elizondo, Dre, Storch, the Game and 50 Cent.  It was released in 2004 as the lead single from Game's debut studio album "The Documentary".  The song debuted at #99 and peaked at #93 on the "Billboard" Hot 100.  It was an airplay-only release, thus no music video for the song was made.  Rolling Stone's review of the album described this song as "a kind of L.A. version of "In da Club".  The Game has stated that this song is a tribute to Tupac Shakur, with a direct reference to him, saying "I got +California Love+ fuckin' bitches to that Pac shit."  The Game also makes references to Tupac's songs, "California Love" and "Against All Odds".  Other references include: Nate Dogg, Tha Dogg Pound (D.P.G.) and their song "New York", Westside Connection, Michael Jackson and his album "Thriller", DJ Pooh and Kool G Rap.  There is a remix featuring Snoop Dogg singing the hook and a version with both Snoop Dogg and 50 Cent on it. <SEP> "Waiting for Superman" is a song co-written by Chris Daughtry for his band Daughtry's fourth studio album, "Baptized".  It was released as the lead single from the album on September 17, 2013.  The song's title and lyrics are references to the comic book superhero Superman and includes other references to the comic, including Lois Lane and Metropolis. <SEP> "The Entertainer" is a single by singer Billy Joel released as the only single from his 1974 album "Streetlife Serenade".  Another verse in the song references the shortening of Joel's song, "Piano Man", from 5 minutes and 38 seconds to 3 minutes and 5 seconds to fit a radio slot, referenced by the lyrics "It was a beautiful song, / but it ran too long / If you're gonna have a hit, you gotta make it fit / So they cut it down to 3:05."  The song peaked at #34 on the US charts, a Top 40 hit for Joel that year.  The song is a cynical and somewhat satirical look at the fleeting fame of a musician and fickle public tastes ("Today I am your champion / I may have won your hearts / But I know the game / You'll forget my name / And I won't be here / in another year / if I don't stay on the charts"); this theme would be examined in the later song "It's Still Rock and Roll to Me".  Additionally, the timing printed on the label of the 7" release of "The Entertainer" was 3:05, although the actual 45 length was 3:11 (while the album length was 3:41).  In the single version, Verse 3 (which starts at 1:02 in the album version) is edited out, and Verse 2 (which starts at 0:40) contains a steel guitar in its second half, which is actually featured in the second half of the "third" verse in the album version; indeed, on the single mix, the instrumental crescendo of the album version is anticipated by bringing the fuller instrumentation of Verse 3 under the vocals of Verse 2.  As a result of this, the slightly emptier original instrumentation of Verse 2 (which includes a downward slide on the synth) and the vocals of Verse 3 are completely omitted, while the instrumentation of Verse 3 (featuring the steel guitar) does appear, but earlier. <SEP> "Piano Man" is the first single released by Billy Joel.  It was released on November 2, 1973, and has been included on several subsequent albums.  Joel's first major hit and his signature song, the song peaked at #25 on the "Billboard" Hot 100 chart in April 1974.  In 2016, the Library of Congress selected "Piano Man" for preservation in the National Recording Registry for its "cultural, historic, or artistic significance."