Question: Which English poet, painter, and printmaker wrote the poetry on which Tangerine Dream based the lyrics of its thirty-first album?

Context paragraphs:
The Dream Mixes: The Dream Mixes is the first remix album by Tangerine Dream and their fifty-second overall.  The album is a collection of extant Tangerine Dream songs remixed with a dance beat and is the first in a series that includes "TimeSquare – Dream Mixes II" (1997), "DM3 – The Past Hundred Moons" (2001), "DM 4" (2003), "DM 2.1" (2007), and "DM V" (2010).  In 1996, the album was re-released as a two-CD set that included six new songs.  This set was released again in 1998 as "Dream Mixes One".

Madcap's Flaming Duty: Madcap's Flaming Duty is a 2007 album by Tangerine Dream.  It is their ninety-eighth album.  Along with "Cyclone" (1978) and "Tyger" (1987) it is one of the few Tangerine Dream releases to feature vocals.  The album is a tribute to Syd Barrett who died in 2006; the title references Barrett's album "The Madcap Laughs".

Sorcerer (soundtrack): Sorcerer (1977) is the first soundtrack album and ninth album overall by the German band Tangerine Dream.  It is the soundtrack for the film "Sorcerer".  It reached No.25 on the UK Albums Chart in a 7-week run, to become Tangerine Dream's third highest-charting album in the UK.

Dream Music – The Movie Music of Tangerine Dream: Dream Music – The Movie Music of Tangerine Dream is a 1993 compilation album by Tangerine Dream featuring material from three of soundtrack albums for the films "The Park Is Mine", "Deadly Care" and "Dead Solid Perfect".

Pergamon (album): Pergamon (1986), originally simply released as Tangerine Dream (1980) with two parts "Quichotte" - Part one and two, is the third live album and fourteenth overall by Tangerine Dream.  It is a selection from the two live concerts held on 31 January 1980 at the Palast der Republik in East Berlin.  The second of the two original concerts is available as "Tangerine Tree Volume 17: East Berlin 1980".  The original title "Quichotte" is a reference to Don Quixote, a film version of which was being screened in a nearby cinema as one of the concerts was performed, while the retitle is a reference to the Pergamon Museum located in East Berlin near the Palast der Republik.

Tangerine Dream Plays Tangerine Dream: Tangerine Dream Plays Tangerine Dream is an album by German electronic music group, Tangerine Dream.  It features re-recordings by several present and past members of the band.

Purgatorio (album): Purgatorio is the seventy-eighth album by electronic band Tangerine Dream.  It was released in October 2004.  A pre-release version was only available via internet at the Tangerine Dream's website in March 2004.  The album includes a studio version of a live performance at the Royal Festival Hall, in London, on March 6th, 2004.  The show was the opening night of the Ether Electronic Music Festival followed by the world premiere of a restored version of the Italian silent movie “Purgatorio” from 1911 by Giuseppe de Liguoro's, based on the second part of Dante Alighieri’s “La Divina Commedia.”

William Blake: William Blake (28 November 1757 – 12 August 1827) was an English poet, painter, and printmaker.  Largely unrecognised during his lifetime, Blake is now considered a seminal figure in the history of the poetry and visual arts of the Romantic Age.  What he called his prophetic works were said by 20th century critic Northrop Frye to form "what is in proportion to its merits the least read body of poetry in the English language".  His visual artistry led 21st-century critic Jonathan Jones to proclaim him "far and away the greatest artist Britain has ever produced".  In 2002, Blake was placed at number 38 in the BBC's poll of the 100 Greatest Britons.  Although he lived in London his entire life (except for three years spent in Felpham), he produced a diverse and symbolically rich "œuvre", which embraced the imagination as "the body of God" or "human existence itself".

Tangerine Tree: Tangerine Tree was a fan project operating from 2002 through 2006 with the goal of collecting, preserving and distributing unreleased concerts and other audio material by the band Tangerine Dream.  The creators of the Tangerine Tree project received permission from Tangerine Dream to release the collection on a strict non-profit basis.  Several of the Tangerine Tree volumes have been used as the basis for official Tangerine Dream releases.  The project collected just under 300 hours of material (291:39:26).

Tyger (album): Tyger is the thirty-first album by Tangerine Dream.  It is based on the poetry of William Blake.  Lyrics are based on the poems "The Tyger", "Smile", "America a Prophecy", "The Fly", and "London".

Supporting paragraphs: Tyger (album) William Blake
Answer: William Blake