Question: When did the author of the The Cloud die?

full_context: Document 1: Ode to the West Wind: "Ode to the West Wind" is an ode, written by Percy Bysshe Shelley in 1819 near Florence, Italy. It was originally published in 1820 by Charles in London as part of the collection "Prometheus Unbound, A Lyrical Drama in Four Acts, With Other Poems". Perhaps more than anything else, Shelley wanted his message of reform and revolution spread, and the wind becomes the trope for spreading the word of change through the poet-prophet figure. Some also believe that the poem was written in response to the loss of his son, William (born to Mary Shelley) in 1819. The ensuing pain influenced Shelley. The poem allegorises the role of the poet as the voice of change and revolution. At the time of composing this poem, Shelley without doubt had the Peterloo Massacre of August 1819 in mind. His other poems written at the same time—"The Masque of Anarchy", "Prometheus Unbound", and "England in 1819"—take up these same themes of political change, revolution, and role of the poet.
Document 2: A Philosophical View of Reform: A Philosophical View of Reform is a major prose work by Percy Bysshe Shelley written in 1819-20 and first published in 1920 by Oxford University Press. The political essay is Shelley's longest prose work.
Document 3: Prometheus Unbound (Shelley): Prometheus Unbound is a four-act lyrical drama by Percy Bysshe Shelley, first published in 1820. It is concerned with the torments of the Greek mythological figure Prometheus, who defies the gods and gives fire to humanity, for which he is subjected to eternal punishment and suffering at the hands of Zeus. It is inspired by the classical "Prometheia", a trilogy of plays attributed to Aeschylus. Shelley's play concerns Prometheus' release from captivity, but unlike Aeschylus' version, there is no reconciliation between Prometheus and Jupiter (Zeus). Instead, Jupiter is abandoned by his supportive elements and falls from power, which allows Prometheus to be released.
Document 4: The Cloud (poem): "The Cloud" is a major 1820 poem written by Percy Bysshe Shelley. "The Cloud" was written during late 1819 or early 1820, and submitted for publication on 12 July 1820. The work was published in the 1820 collection "Prometheus Unbound, A Lyrical Drama, in Four Acts, With Other Poems" by Charles and James Ollier in London in August 1820. The work was proof-read by John Gisborne. There were multiple drafts of the poem. The poem consists of six stanzas in anapestic or antidactylus meter, a foot with two unaccented syllables followed by an accented syllable.
Document 5: Claire Clairmont: Clara Mary Jane Clairmont (27 April 1798 – 19 March 1879), or Claire Clairmont as she was commonly known, was the stepsister of writer Mary Shelley and the mother of Lord Byron's daughter Allegra. She is thought to be the subject of a poem by Percy Bysshe Shelley.
Document 6: Lyrical Ballads: Most of the poems in the 1798 edition were written by Wordsworth, with Coleridge contributing only four poems to the collection, including one of his most famous works, ``The Rime of the Ancient Mariner ''.
Document 7: A Defence of Poetry: "A Defence of Poetry" is an essay by the English poet Percy Bysshe Shelley, written in 1821 and first published posthumously in 1840 in "Essays, Letters from Abroad, Translations and Fragments" by Edward Moxon in London. It contains Shelley's famous claim that "poets are the unacknowledged legislators of the world".
Document 8: Julian and Maddalo: Julian and Maddalo: A Conversation (1818–19) is a poem in 617 lines of enjambed heroic couplets by Percy Bysshe Shelley published posthumously in 1824.
Document 9: I Wandered Lonely as a Cloud: ``I Wandered Lonely as a Cloud ''(also commonly known as`` Daffodils'') is a lyric poem by William Wordsworth. It is Wordsworth's most famous work.
Document 10: Percy Bysshe Shelley: Percy Bysshe Shelley ( ; 4 August 17928 July 1822) was one of the major English Romantic poets, who is regarded by some as among the finest lyric and philosophical poets in the English language, and one of the most influential. A radical in his poetry as well as in his political and social views, Shelley did not see fame during his lifetime, but recognition of his achievements in poetry grew steadily following his death. Shelley was a key member of a close circle of visionary poets and writers that included Lord Byron, John Keats, Leigh Hunt, Thomas Love Peacock and his own second wife, Mary Shelley, the author of "Frankenstein".
Document 11: Adonais: Shelley regarded Adonais as the ``least imperfect ''of his works. In a 5 June 1821 letter to John and Maria Gisborne, Shelley wrote about the work:`` It is a highly wrought piece of art, perhaps better in point of composition than anything I have written.''
Document 12: Mary Shelley: Mary Shelley was born Mary Wollstonecraft Godwin in Somers Town, London, in 1797. She was the second child of the feminist philosopher, educator, and writer Mary Wollstonecraft, and the first child of the philosopher, novelist, and journalist William Godwin. Wollstonecraft died of puerperal fever shortly after Mary was born. Godwin was left to bring up Mary, along with her older half-sister, Fanny Imlay, Wollstonecraft's child by the American speculator Gilbert Imlay. A year after Wollstonecraft's death, Godwin published his "Memoirs of the Author of A Vindication of the Rights of Woman" (1798), which he intended as a sincere and compassionate tribute. However, because the "Memoirs" revealed Wollstonecraft's affairs and her illegitimate child, they were seen as shocking. Mary Godwin read these memoirs and her mother's books, and was brought up to cherish her mother's memory.
Document 13: A Defence of Poetry: ``A Defence of Poetry ''is an essay by the English poet Percy Bysshe Shelley, written in 1821 and first published posthumously in 1840 in Essays, Letters from Abroad, Translations and Fragments by Edward Moxon in London. It contains Shelley's famous claim that`` poets are the unacknowledged legislators of the world''.
Document 14: I Wandered Lonely as a Cloud: The poem was inspired by an event on 15 April 1802, in which Wordsworth and his sister Dorothy came across a ``long belt ''of daffodils. Written some time between 1804 and 1807 (in 1804 by Wordsworth's own account), it was first published in 1807 in Poems in Two Volumes, and a revised version was published in 1815.
Document 15: I Wandered Lonely as a Cloud: "I Wandered Lonely as a Cloud" (also commonly known as "Daffodils") is a lyric poem by William Wordsworth. It is Wordsworth's most famous work.
ground_truth: 8 July 1822
sub_queries: The Cloud >> author Answer: Percy Bysshe Shelley
The year Percy Bysshe Shelley died was what? Answer: 8 July 1822