Question: The most famous and often parodied poem by Joyce Kilmer was written in what verse structure?

full_context: Document 1: No Foe Shall Gather Our Harvest: "No Foe Shall Gather Our Harvest" is a poem by Australian poet Mary Gilmore. It was first published in "The Australian Women's Weekly" on 29 June 1940,and later in the poet's collection "Fourteen Men". Two lines from the poem ("No foe shall gather our harvest/Or sit on our stockyard rail.") appear on the Australian ten-dollar note.
Document 2: Joyce Kilmer: Joyce Kilmer (born as Alfred Joyce Kilmer; December 6, 1886 – July 30, 1918) was an American writer and poet mainly remembered for a short poem titled "Trees" (1913), which was published in the collection "Trees and Other Poems" in 1914. Though a prolific poet whose works celebrated the common beauty of the natural world as well as his Roman Catholic religious faith, Kilmer was also a journalist, literary critic, lecturer, and editor. While most of his works are largely unknown, a select few of his poems remain popular and are published frequently in anthologies. Several critics—including both Kilmer's contemporaries and modern scholars—have disparaged Kilmer's work as being too simple and overly sentimental, and suggested that his style was far too traditional, even archaic. Many writers, including notably Ogden Nash, have parodied Kilmer's work and style—as attested by the many parodies of "Trees".
Document 3: Rouge Bouquet (poem): "Rouge Bouquet" or "The Wood Called Rouge Bouquet" is a lyric poem written in 1918 by American poet, essayist, critic and soldier Joyce Kilmer (1886-1918). The poem commemorates during an intense German artillery bombardment of an American trench position in the Rouge Bouquet wood near the French village of Baccarat on 7 March 1918 that resulted in the loss of 19 American soldiers with the 165th Infantry Division. Kilmer was a sergeant in the New York National Guard's "The Fighting 69th Regiment" which was part of the 165th Infantry Regiment involved in the attack. Kilmer composed the poem immediately after the bombardment, and it was first read over their graves in March 1918. The poem was first published two weeks after Kilmer's death in battle on 30 July 1918 during the Second Battle of the Marne in the 16 August 1918 issue of "Stars and Stripes". The poem was read over Kilmer's own grave when he was interred in France. To this day, it is a tradition of the Fighting 69th to read the poem at memorial services for fallen members of the regiment.
Document 4: The Tree (book): The Tree is an autobiographical book by John Fowles. In it, Fowles discusses the essence of nature and its relation to the creative arts, especially writing.
Document 5: Miniver Cheevy: "Miniver Cheevy" is a narrative poem written by Edwin Arlington Robinson and first published in "The Town down the River" in 1910. The poem, written in quatrains of iambic tetrameter for three lines, followed by a catalectic line of only three iambs, relates the story of a hopeless romantic who spends his days thinking about what might have been if only he had been born earlier in time.
Document 6: All Watched Over by Machines of Loving Grace: "All Watched Over by Machines of Loving Grace" is a poem by Richard Brautigan first published in his 1967 collection of the same name, his fifth book of poetry. It is an enthusiastic description of a technological utopia in which machines improve and protect the lives of humans. It is Brautigan's most frequently reprinted poem.
Document 7: Wilfred Owen: Wilfred Edward Salter Owen, MC (18 March 1893 – 4 November 1918) was an English poet and soldier, one of the leading poets of the First World War. His war poetry on the horrors of trenches and gas warfare was heavily influenced by his mentor Siegfried Sassoon, and stood in stark contrast both to the public perception of war at the time and to the confidently patriotic verse written by earlier war poets such as Rupert Brooke. Among his best-known works – most of which were published posthumously – are "Dulce et Decorum est", "Insensibility", "Anthem for Doomed Youth", "Futility", "Exposure" and "Strange Meeting".
Document 8: Suicide in the Trenches: “Suicide in the Trenches,” by the English poet Siegfried Sassoon (1886-1967), is one of the many poems Sassoon composed in response to World War I. It reflects his own notable service in that especially bloody conflict. Sassoon was a brave and gallant upper-class officer who eventually opposed the war, but he never lost his admiration for the common soldiers who had to fight it. Sassoon felt contempt for the political leaders and civilian war hawks who, safe in their power and comfort, sent young men off to die in huge battles that seemed futile and pointless. It was first published February 23, 1918 in "Cambridge Magazine", then in Sassoon's collection: "Counter-Attack and Other Poems". The poem is written in iambic tetrameter and consists of twelve lines in three stanzas.
Document 9: Trees (poem): "Trees" is a lyric poem by American poet Joyce Kilmer. Written in February 1913, it was first published in "Poetry: A Magazine of Verse" that August and included in Kilmer's 1914 collection "Trees and Other Poems". The poem, in twelve lines of rhyming couplets of iambic tetrameter verse, describes what Kilmer perceives as the inability of art created by humankind to replicate the beauty achieved by nature.
Document 10: The Fir-Tree: "The Fir-Tree" (Danish: "Grantræet") is a literary fairy tale by the Danish poet and author Hans Christian Andersen (1805–1875). The tale is about a fir tree so anxious to grow up, so anxious for greater things, that he cannot appreciate living in the moment. The tale was first published 21 December 1844 with "The Snow Queen", in Copenhagen, Denmark, by C.A. Reitzel. One scholar (Andersen biographer Jackie Wullschlager) indicates that "The Fir-Tree" was the first of Andersen's fairy tales to express a deep pessimism.
Document 11: Joyce Kilmer Memorial Forest: Joyce Kilmer Memorial Forest is an approximately 3,800-acre tract of publicly owned virgin forest in Graham County, North Carolina, named in memory of poet Joyce Kilmer (1886–1918), best known for his poem "Trees". One of the largest contiguous tracts of old growth forest in the Eastern United States, the area is administered by the U. S. Forest Service. The memorial forest is a popular family hiking destination and features an easy two-mile, figure-eight trail that includes a memorial plaque at the juncture of the two loops. In 1975 the memorial forest was joined with a much larger tract of the Nantahala National Forest to become part of the Joyce Kilmer-Slickrock Wilderness.
Document 12: Joyce Kilmer Middle School: Joyce Kilmer Middle School is a school in the Fairfax County Public Schools System in unincorporated Fairfax County, Virginia, United States, east of the city of Vienna. Kilmer serves grades 7-8. It was named after the journalist and poet Joyce Kilmer. Kilmer has a GT program for students who have been determined to be "Gifted and Talented." It is now called AAP, or "Advanced Academics Program."
Document 13: Birches (poem): "Birches" is a poem by American poet Robert Frost(1874-1963). It was collected in Frost's third collection of poetry "Mountain Interval" that was published in 1916. Consisting of 59 lines, it is one of Robert Frost's most anthologized poems. The poem "Birches", along with other poems that deal with rural landscape and wildlife, shows Frost as a nature poet.
Document 14: The Maytrees: The Maytrees is American author Annie Dillard's second novel, a fictional account of the lives of Toby and Lou Maytree in Provincetown, MA, from the time of courting to old age.
Document 15: Futility (poem): "Futility" is a poem written by Wilfred Owen, one of the most renowned poets of World War I. The poem was written in May 1918 and published as no. 153 in "The Complete Poems and Fragments". The poem is well known for its departure from Owen's famous style of including disturbing and graphic images in his work; the poem instead having a more soothing, somewhat light-hearted feel to it in comparison. A previous secretary of the Wilfred Owen Association argues that the bitterness in Owen's other poems "gives place to the pity that characterises his finest work". Futility details an event where a group of soldiers attempt to revive an unconscious soldier by moving him into the warm sunlight on a snowy meadow. However, the "kind old sun" cannot help the soldier - he has died.
ground_truth: iambic tetrameter