Question: Door into the Dark is a poetry collection by a man that received the Nobel Prize in Literature in what year?

full_context: Document 1: Günter Grass: Günter Wilhelm Grass (] ; 16 October 1927 – 13 April 2015) was a German novelist, poet, playwright, illustrator, graphic artist, sculptor, and recipient of the 1999 Nobel Prize in Literature.
Document 2: The Collected Essays and Occasional Writings of Katherine Anne Porter: The Collected Essays and Occasional Writings of Katherine Anne Porter
Document 3: The Whitsun Weddings (poem): "The Whitsun Weddings", read here by Larkin himself, is one of the best known poems by British poet Philip Larkin. It was written and rewritten and finally published in the 1964 collection of poems, also called The Whitsun Weddings. It is one of three poems that Larkin wrote about train journeys.
Document 4: Poetry and People International Poetry Prize: The Poetry and People International Poetry Prize is an annual international lifetime achievement award given to poets around the world by the poetry magazine Poetry and People and its founder Huang Lihai. The first “Poetry and People Poet Prize” was awarded in 2005 to Eugénio de Andrade, before it changed its name to “Poetry and People International Poetry Prize”. Recipients since have included Derek Walcott, Lan Lan, Xi Chuan and Rita Dove. The prize was given to Tomas Tranströmer in April 2011, six months before it was announced that he was to be awarded the Nobel Prize for Literature.
Document 5: Electric Light (poetry collection): Electric Light (Faber and Faber, 2001, ISBN  ) is a poetry collection by Seamus Heaney, who received the 1995 Nobel Prize in Literature. The collection explores childhood, nature, and poetry itself.
Document 6: Seamus Heaney: Seamus Justin Heaney, ( ; 13 April 1939 – 30 August 2013) was an Irish poet, playwright, translator and lecturer from Northern Ireland. He received the 1995 Nobel Prize in Literature.
Document 7: Door into the Dark: Door into the Dark (1969) is a poetry collection by Seamus Heaney, who received the 1995 Nobel Prize in Literature. Poems include "Requiem for the Croppies", "Thatcher" and "The Wife's Tale". Heaney has been recorded reading this collection on the "Seamus Heaney Collected Poems" album.
Document 8: Saeed Ahmad Akhtar: Saeed Ahmad Akhtar was an Urdu poet, playwright and educationist. He came up with his 1st Urdu poetry collection “Diyaar e Shab” in 1976. It was the best selling book of the year and got many awards including the "Abbasin Arts Council Award" for the best book of the year. He published 12 Urdu poetry collections and one English poetry collection so far. All his books sold out like hot cakes. He also wrote many plays and documentaries for Pakistan television and Radio Pakistan.
Document 9: The Spirit Level (poetry collection): The Spirit Level (1996) is a poetry collection written by Seamus Heaney, who received the 1995 Nobel Prize in Literature. It won the poetry prize for the 1996 Whitbread Awards.
Document 10: District and Circle: District and Circle is a poetry collection by Seamus Heaney, who received the 1995 Nobel Prize in Literature. It was published in 2006 and won the 2006 T. S. Eliot Prize, the most prestigious poetry award in the UK. The collection also won the "Irish Times" "Poetry Now Award".
Document 11: The Far Field (poetry collection): The Far Field is a 1964 poetry collection by Theodore Roethke, and the poem for which it was named. It was Roethke's final collection, published after his death in 1963.
Document 12: Ireland Professor of Poetry: The position of Ireland Professor of Poetry is an academic chair, jointly administered in trust by Queen's University Belfast, Trinity College, Dublin, University College Dublin, the Arts Council of Northern Ireland and the Arts Council. The post and the funding for it were put in place to commemorate the awarding of the Nobel Prize in Literature to the poet Seamus Heaney in 1995. A new professor is appointed every three years. During the period of appointment, the professor spends one year attached to each of the three universities, and is in residence at the university for eight weeks during that year, conducting workshops and promoting poetry.
Document 13: Omeros: Omeros is an epic poem by Caribbean writer Derek Walcott, first published in 1990. The work is divided into seven "books" containing a total of sixty-four chapters. Many critics view "Omeros" as Walcott's "major achievement." Soon after its publication in 1990, it received praise from publications like "The Washington Post" and "The New York Times Book Review", the latter of which chose the book as one of its "Best Books of 1990" and called it "one of Mr. Walcott's finest poetic works." The book also won the WH Smith Literary Award in 1991. In 1992, Walcott was also awarded the Nobel Prize for Literature, and the Nobel committee member who presented the award, Professor Kjell Espmark, singled out Walcott's most recent achievement at the time, "Omeros", recognizing the book as a "major work". Walcott painted the cover for the book, which depicts some of his main characters at sea together in a boat. In 2004, the critic Hilton Als of "The New Yorker" called the book "Walcott's masterpiece" and characterized the poem as "the perfect marriage of Walcott’s classicism and his nativism".
Document 14: Human Chain (poetry collection): Human Chain (2010) is the twelfth and final poetry collection by Seamus Heaney, who received the 1995 Nobel Prize in Literature. It won the Forward Poetry Prize Best Collection 2010 award, the Irish Times Poetry Now Award for 2011, and was shortlisted for the 2011 Griffin Poetry Prize. This was Heaney's second Poetry Now Award, having previously won in 2007 for "District and Circle".
Document 15: Derek Walcott: Sir Derek Alton Walcott, KCSL, OBE, OCC (23 January 1930 – 17 March 2017) was a Saint Lucian poet and playwright. He received the 1992 Nobel Prize in Literature. He was Professor of Poetry at the University of Essex from 2010 to 2013. His works include the Homeric epic poem "Omeros" (1990), which many critics view "as Walcott's major achievement." In addition to winning the Nobel Prize, Walcott received many literary awards over the course of his career, including an Obie Award in 1971 for his play "Dream on Monkey Mountain", a MacArthur Foundation "genius" award, a Royal Society of Literature Award, the Queen's Medal for Poetry, the inaugural OCM Bocas Prize for Caribbean Literature, the 2011 T. S. Eliot Prize for his book of poetry "White Egrets" and the Griffin Trust For Excellence In Poetry Lifetime Recognition Award in 2015.
ground_truth: 1995