Question: When was the British singer, songwriter and record producer born who was involved in both album LP1 and Process?

Context paragraphs:
Michelle Bell: Michelle Bell is an American singer-songwriter and record producer born in Ohio.  Bell started to work on a local paper while she was in college, and used to write to publicists at record labels.  After moving to New York City, she went on working with Sean Combs.  Together they wrote and produced tracks for Jennifer Lopez.  Following the release of Lopez's album, Bell became known as a songwriter and producer, working with several artists, including Britney Spears, Girls Aloud, Mary J. Blige and Paulina Rubio.

LP1 (FKA Twigs album): LP1 is the debut studio album by English singer and songwriter FKA Twigs, released on 6 August 2014 by Young Turks.  Production on the album is handled by FKA Twigs herself, alongside Emile Haynie, Arca, Cy An Devonté Hynes, Clams Casino, Paul Epworth, Sampha and Tic.

Close (Sub Focus song): "Close" is a song by British DJ and record producer Sub Focus.  It was released on 21 April 2014 as the seventh single from his second studio album "Torus".  The song featured vocals from British singer MNEK in the album version.  The vocals on the single version are performed by British singer Daniel Pearce.  The new vocals were re-produced by Hal Ritson, who also provided backing vocals.

Marc Aryan: Henri Markarian, better known as Marc Aryan (14 November 1926 in Valence, France – 30 November 1985 in Ohain, Belgium), was a French-Belgian singer, songwriter, and record producer born as a French citizen, who also acquired Belgian citizenship after a long residency in the country.

Zak Waters: Zak Waters is an American musician, singer, songwriter, disc jockey, and record producer born and raised in Los Angeles, California, currently recording music under the alias Pretty Sister.  Waters founded the Universal Records pop rock group Blueskyreality in 2008.  He became a solo artist thereafter, releasing two EPs and two studio albums.  He launched his solo musical project Pretty Sister in September 2015.

Butterfly Boucher: Butterfly Giselle Grace Boucher (born 2 June 1979) is an Australian singer-songwriter, multi-instrumentalist and record producer born in Adelaide.  From the age of 15 years she played bass guitar in her older sister, Rebecca Boucher Burns (Becca)'s band Eat the Menu (later named The Mercy Bell), which issued a debut album, "Whoosh", in 1996.  Since mid-2000 Boucher has lived in Nashville, United States, and has released four solo albums, "Flutterby" (October 2003), "Scary Fragile" (June 2009) a self-titled album (April 2012), and a 10th-anniversary celebration of Flutterby called "Happy Birthday Flutterby" (23 August 2014).  Since 2008 Boucher has recorded material for Ten Out of Tenn, a Nashville-based music collective.  Boucher is also a member of the Pop/Rock trio Elle Macho.

LP1 (Joss Stone album): LP1 is the fifth studio album by English singer and songwriter Joss Stone.  It was released on 21 July 2011 on Stone's own label, Stone'd Records, in partnership with Surfdog Records, following her departure from EMI in 2010.  The album was recorded at Blackbird Studios in Nashville, Tennessee in six days.  Stone co-wrote and co-produced the album with record producer and Eurythmics co-founder, Dave Stewart.

Ronnie Radke: Ronald Joseph Radke (born December 15, 1983) is an American singer, songwriter, entertainer, and record producer born in Las Vegas, Nevada.  He is the founding member and current lead vocalist, keyboardist, and recently guitarist for the rock band Falling in Reverse, and is the former vocalist and founding member of post-hardcore band Escape the Fate.

Dibby Dibby Sound: "Dibby Dibby Sound" is a song by British record producer DJ Fresh and American record producer Jay Fay (whose track it is heavily based on), featuring vocals from British singer Ms. Dynamite.  It was released on 2 February 2014 as the second single from his forthcoming fourth studio album.  The song was written by Dan Stein, The Invisible Men, Niomi McLean-Daley and Joshua Fagin.  It premiered on Zane Lowe's BBC Radio 1 show, who made it the week's "Hottest Record in the World" on 29 October 2013.

Sampha: Sampha Sisay (born 16 November 1988), who performs under the mononym Sampha, is a British singer, songwriter and record producer from Morden, South London, United Kingdom.  Sampha is known widely for his collaborative work with SBTRKT, Jessie Ware, Drake, Kanye West, Solange and others.  Sampha has released two solo EPs: "Sundanza" (2010) and "Dual" (2013).  Sampha's debut album, "Process", was released on 3 February 2017, through Young Turks and won the 2017 Mercury Prize.

Supporting paragraphs: LP1 (FKA Twigs album) Sampha
Answer: 16 November 1988