Question: Ricci Riera produced a song by the English singer from what city?

Context paragraphs:
Learning to Live (Without Your Love): "Learning to Live (Without Your Love)" is a song by English singer Rick Astley and English singer O'Chi Brown.  The song was originally released in 1986 as an album track on Brown's album "O'Chi".  Astley was uncredited on the album and received no royalties.

Unpredictable (Olly Murs and Louisa Johnson song): "Unpredictable" is a song recorded by English singer Olly Murs for his fifth studio album, "24 Hrs" (2016).  It was written and produced by Cutfather, Daniel Davidsen and Peter Wallevik, with an additional writing from Kara DioGuardi and Iain James.  Originally recorded as a solo version, it was remixed by Matt Rad with additional vocals from English singer Louisa Johnson and was digitally released on 31 May 2017 in the United Kingdom.

Ricci Riera: Ricci Riera, is an American record producer, DJ and songwriter from Los Angeles, California.  He is best known for his production with notable hip hop artists such as Kendrick Lamar, Drake, Travis Scott, Schoolboy Q, and ASAP Rocky among others.  Aside from his solo production, Riera was previously a member of the Grammy Nominated LA production duo THC.  Riera scored his first Grammy nomination as a solo producer with "U Wit Me?"  on the second best selling album of 2016, Views.  Ricci most recently appeared twice on Kendrick Lamar's much anticipated 3rd studio album Damn.  producing on songs "Element" co produced by James Blake and "God".

Flashlight (DJ Fresh song): "Flashlight" is a song by English singer and songwriter Ellie Goulding featuring production work from DJ Fresh, released as the fourth single from Fresh's forthcoming fourth studio album.  It was released on 28 September 2014 in the United Kingdom as a single, although it was previously out on Goulding's album from 2013.  The song features English singer and songwriter Ellie Goulding and also included as one of the tracks on Goulding's "Halcyon Days" (2013), the reissue of her second studio album, "Halcyon" (2012).  The Invisible Men assisted the artists in writing the song.

O'Chi Brown: O'Chi Brown (born Doris Gubbins) is an English singer and songwriter born in Tottenham, London, England.  She scored two hits on the Dance Club Songs, the most successful being "Whenever You Need Somebody," which hit number one in 1986.  The song's producers (Stock Aitken Waterman) would recycle the song for English singer Rick Astley a year later, and it would be the title of his debut studio album on PWL.

Always Never Home: Always Never Home is an extended play by American singer Syd.  It was released on September 7, 2017, via Columbia Records for streaming and digital download.  The project succeeds Syd's debut album "Fin" (2017), released seven months prior.  Consisting of three tracks, the EP includes production from Ricci Riera, Full Crate, Anonxmous, Gwenn Bunn and Kintaro.

God (Kendrick Lamar song): "God" (stylized as "GOD.")  is a song by American rapper Kendrick Lamar, from his fourth studio album "Damn", released on April 14, 2017.  The thirteenth and penultimate track on the album, the song was written by Lamar, Ricci Riera, Mark Spears, aka Sounwave, DJ Dahi, Daniel Tannenbaum, Ronald LaTour and Anthony Tiffith, and produced by Riera, Sounwave, DJ Dahi, Bëkon, Cardo, and Tiffith.

James Blake (musician): James Blake Litherland (born 26 September 1988), known as James Blake, is an English singer, songwriter, musician and record producer from London.  He first received recognition in 2010 for a trio of dubstep-influenced EPs, and the following year his self-titled debut album was released in the United Kingdom to critical praise.  His second studio album "Overgrown" was released in 2013 and was awarded the Mercury Prize.  He released his third studio album "The Colour in Anything" in 2016.  Blake has also released remix work under the alias Harmonimix.

Element (song): "Element" (stylized as "ELEMENT.")  is a song by American rapper Kendrick Lamar, from his fourth studio album "Damn", released on April 14, 2017.  The fourth track on the album, the song was written by Lamar, Mark Spears, aka Sounwave, James Blake, and Ricci Riera and produced by Sounwave, Blake, and Riera, with additional production by Tae Beast and Bēkon.

Who Am I (Katy B song): "Who Am I" is a song recorded by English singer Katy B for her third studio album, "Honey" (2016).  It is a collaboration with American electronic music band Major Lazer and English singer Craig David.  The song was written by Brien, David, Jr.  Blender, Thomas Pentz and produced by Geneeus, Jr.  Blender and Pentz.  It was released on 5 February 2016 as the lead single from the album.

Supporting paragraphs: Ricci Riera James Blake (musician)
Answer: London