Question: Who died first, Billy Mackenzie or Simon Neil?

Context paragraphs:
Billy Mackenzie: William MacArthur "Billy" MacKenzie (27 March 1957 – 22 January 1997) was a Scottish singer, with a distinctive high tenor voice; he was best known as a member of The Associates.

The Key to Perfection: The Key to Perfection is a promo album by Swiss electronic duo Yello, released on September 4, 2012.  It was not released on a label, and was distributed by Volkswagen officials at special events.  The record contains additional vocals by Billy Mackenzie (on track 3), Heidi Happy (on track 4), and Malia (on track 7).

Billy MacKenzie (motorcyclist): Billy MacKenzie (born 7 April 1984 in Edinburgh) is a Scottish professional motocross racer.

One Second (Yello album): One Second is Yello's fifth original studio album, having been preceded by a 'new mix' compilation the previous year.  Released in 1987, the album is noteworthy for featuring both Billy MacKenzie and Shirley Bassey, the latter singing vocals on "The Rhythm Divine".

Say (The Creatures song): "Say" is a song recorded by English band The Creatures (aka singer Siouxsie Sioux and drummer Budgie).  It was co-produced by Steve Levine.  The song is about the suicide of Billy Mackenzie of Associates.

Chain (Paul Haig album): Chain was Edinburgh musician Paul Haig's third album and was released in May 1989 on Circa Records, a subsidiary of Virgin Records.  "Chain", which Haig financed himself, was recorded and completed in 1988, but it sat on the shelf after the normally accommodating Les Disques Du Crepuscule decided not to take up the option of releasing it.  The album was co-produced by long-time Haig cohort, Alan Rankine, instrumentalist with celebrated Dundee band, The Associates.  There was another Associates connection on the album - the track "Chained" was written by Haig's good friend, Billy Mackenzie.  Haig returned the favour and gave Mackenzie the track "Reach The Top" for his album "The Glamour Chase", which after many years in limbo was finally released in 2002.

Simon Neil: Simon Alexander Neil (born 31 August 1979) is a Scottish vocalist, guitarist, and songwriter.

Electro Glide in Blue: Electro Glide in Blue is the second album by the British electronic band Apollo 440.  The album features Charles Bukowski, Billy Mackenzie and a tribute to Gene Krupa; all three of whom had died by the time of the album's release.

The Associates (band): The Associates were a Scottish rock act, formed in Dundee in 1979 by singer Billy Mackenzie and guitarist Alan Rankine.  The group first gained recognition after releasing an unauthorized cover of David Bowie's "Boys Keep Swinging" in 1979, which landed them a contract with Fiction Records.  They followed with their debut album "The Affectionate Punch" in 1980 and the singles collection "Fourth Drawer Down" in 1981, both to critical praise.

The Rhythm Divine: "The Rhythm Divine" is a 1987 song by Boris Blank, Dieter Meier, and Billy Mackenzie.

Supporting paragraphs: Billy Mackenzie Simon Neil
Answer: William MacArthur "Billy" MacKenzie