Premise: "Sultans of Swing" is a song by British rock band Dire Straits from their eponymous debut album, which band frontman Mark Knopfler wrote and composed. Although it was first released in 1978, it was its 1979 re-release that caused it to become a hit in both the UK and U.S.
Hypothesis: Dire Straits considered many different names for the song Sultans of Swing.