Question: Which writer has won three Pulitzer Prizes for his work, Ernesto Sabato or Edwin Arlington Robinson?

Context articles: Van Zorn
Edwin Arlington Robinson
Miniver Cheevy
Richard Cory
Children of The Night
Ernesto Sabato
Edwin Arlington Robinson House
Richard Cory (song)
Merlin (Robinson)
Edith Brower

Van Zorn is a comedy of New York City artist life written in 1914 by Edwin Arlington Robinson.
 It is one of Robinson's two published plays, published just before his volume of poems "The Man Against the Sky".
 As of 1920, "Van Zorn's" only public performances was a 1917 run given in a Brooklyn hall by a semi-professional company.
 "Van Zorn" is about a fatalist who, attempting to play the part of destiny in a love affair, runs counter to a man with a destiny better than his own.
Edwin Arlington Robinson (December 22, 1869 – April 6, 1935) was an American poet who won three Pulitzer Prizes for his work.
 He was nominated for the Nobel Prize in Literature four times.
"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.
"Richard Cory" is a narrative poem written by Edwin Arlington Robinson.
 It was first published in 1897, as part of "The Children of the Night", having been completed in July of that year; and it remains one of Robinson's most popular and anthologized poems.
 The poem describes a person who is wealthy, well educated, mannerly, and admired by the people in his town.
 Despite all this, he fatally shoots himself in the head.
Children of The Night was the second volume of Poetry published by the American Poet Edwin Arlington Robinson.
 While the volume was weakly received President Theodore Roosevelt's son Kermit introduced the work to his father who knowing his straits secured him a job at the NY Customs Office.
Ernesto Sabato (June 24, 1911 – April 30, 2011) was an Argentine writer, painter and physicist.
 According to the BBC he "won some of the most prestigious prizes in Hispanic literature" and "became very influential in the literary world throughout Latin America".
 Upon his death "El País" dubbed him the "last classic writer in Argentine literature".
The Edwin Arlington Robinson House is an historic house at 67 Lincoln Avenue in Gardiner, Maine.
 A relatively unprepossessing two-story wood frame house, it was designated a National Historic Landmark in 1971 for its association with Edwin Arlington Robinson (1869–1935) one the United States' leading poets of the late 19th and early 20th centuries.
"Richard Cory" is a song written by Paul Simon in early 1965, and recorded by Simon and Garfunkel for their second studio album, "Sounds of Silence".
 The song was based on Edwin Arlington Robinson's 1897 poem of the same title.
Merlin is a dramatic narrative poem by Edwin Arlington Robinson, written in 1917.
Edith Brower (August 24, 1848 – September 16, 1931) was a Progressive Era reformer who lived in Wilkes-Barre, Pennsylvania.
 Edith Brower contributed arts columns to The Atlantic Monthly and Harper's Weekly founded the Wyoming Valley Woman’s Club in 1905, which still exists today.
 However, she is perhaps best known for her correspondence with Pulitzer Prize-winning poet Edwin Arlington Robinson.