Question: Set Fire to the Rain was written in which key?
About the article "Set Fire to the Rain", section "Composition".

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 ;Digital EP — remixes "Set Fire to the Rain" (Thomas Gold Remix) –  "Set Fire to the Rain" (Thomas Gold Dub) –  "Set Fire to the Rain" (Moto Blanco Remix) –  "Set Fire to the Rain" (Moto Blanco Edit) –   
"Set Fire to the Rain" is the fifth track on Adele's second album "21".
It was written with producer Fraser T Smith.
It is written in the key of D minor with a tempo of 108 beats per minute, following the chord progression of Dm–F–C–Gm–Dm–F–C–Csus4–C, and Adele's voice spans A3-D5.
The song describes the contradictory elements of a relationship, and the impossibility of letting go which is displayed in the lyrics "You and me together, nothing gets better/But there’s a side to you that I never knew, never knew/All the things you'd say, they were never true, never true/And the games you play, you would always win."
One of the most pop-influenced of the album, the song is characterised by John Murphy of MusicOMH as a "power ballad".
In contrast to the understated production of most songs on the album, the song features lush instrumentation and a swelling string arrangement over a mid-tempo rhythm, creating a wall of sound for the singer's mourning vocals.
Dave Simpson of "The Guardian" in an article revealed that Adele got inspiration for the song "when mah lightah stopped workin'" in the wet.
"Set Fire to the Rain" was written by Adele and Fraser T Smith while the production was handled by Smith.
On 28 October, during an interview with "Billboard", Columbia Records revealed that "Rumour Has It" would be released as the third single from the album and serviced to pop and adult contemporary radio.
However, the release of the song was scrapped and "Set Fire to the Rain" was released as the third US-single on 21 November 2011.
A spokesperson for Columbia, Pete Cosenza stated: "Our research found more programmer preference for 'Set Fire to the Rain'.
[...] Both 'Rumour' and 'Fire' came back strong, but 'Fire' was a bit stronger.
[...] It's a better plan to go with 'Fire' over 'Rumour' at pop and adult radio.
[...] Everyone, from radio to the buying public, seems to be on board."
  In 2012, Grammy Award-nominated Texan blues and folk musician, Ruthie Foster, covered "Set Fire To The Rain" on her album "Let it Burn".
On December 11, 2011, Masha covered "Set Fire To The Rain" on her YouTube channel, her cover received nearly 1 million views as of November 2013.  
"Set Fire to the Rain" is a song by British singer-songwriter Adele from her second studio album "21".
Written by Adele and Fraser T Smith and produced by Smith, the power ballad was released as the second single from the album in Europe.
It was released as the third single in the United Kingdom on 4 July 2011, where the song has peaked at number 11.
The song has peaked at number one in Belgium, Poland, the Netherlands, the Czech Republic, Slovakia, and the United States.
The song has charted within the top 10 of Austria, Canada, Denmark, Finland, France, Germany, Ireland, Italy, New Zealand, Norway, South Africa and Switzerland.
"Set Fire to the Rain" was released on 21 November 2011 as "21"s third official single in the United States, and has since peaked at number one on the "Billboard" Hot 100.
The song is the third consecutive number-one single of the same album; the last female singer who achieved this was Katy Perry in 2010 when "Firework" hit number one.
Adele is the first female British artist in history to have three consecutive US number ones.
With "Rolling in the Deep", "Someone like You" and "Set Fire to the Rain" Adele logged a total of 14 weeks atop of the "Billboard" Hot 100, this is the most number of weeks at number one a British female artist has had from the same album.
The song was voted by readers of "Billboard" as their favorite number one hit of 2012.
Additionally, while "Rolling in the Deep", "Someone like You" and "Set Fire to the Rain" were all US number ones, only Someone like You was a UK number one; and Set Fire to The Rain didn't reach the top ten.
Adele's live version of the song, from the DVD "Live at the Royal Albert Hall", won the Grammy Award for Best Pop Solo Performance at the 55th Annual Grammy Awards.