In July 1945, after the Red Cross confirmed the deaths of the Frank sisters, Miep Gies gave Otto Frank the diary and a bundle of loose notes that she had saved in the hope of returning them to Anne. Otto Frank later commented that he had not realized Anne had kept such an accurate and well-written record of their time in hiding. In his memoir, he described the painful process of reading the diary, recognizing the events described and recalling that he had already heard some of the more amusing episodes read aloud by his daughter. He saw for the first time the more private side of his daughter and those sections of the diary she had not discussed with anyone, noting, "For me it was a revelation ... I had no idea of the depth of her thoughts and feelings ... She had kept all these feelings to herself". Moved by her repeated wish to be an author, he began to consider having it published. Frank's diary began as a private expression of her thoughts; she wrote several times that she would never allow anyone to read it. She candidly described her life, her family and companions, and their situation, while beginning to recognize her ambition to write fiction for publication. In March 1944, she heard a radio broadcast by Gerrit Bolkestein—a member of the Dutch government in exile, based in London—who said that when the war ended, he would create a public record of the Dutch people's oppression under German occupation. He mentioned the publication of letters and diaries, and Frank decided to submit her work when the time came. She began editing her writing, removing some sections and rewriting others, with a view to publication. Her original notebook was supplemented by additional notebooks and loose-leaf sheets of paper. She created pseudonyms for the members of the household and the helpers. The van Pels family became Hermann, Petronella, and Peter van Daan, and Fritz Pfeffer became Albert Düssell. In this edited version, she addressed each entry to "Kitty," a fictional character in Cissy van Marxveldt's Joop ter Heul novels that Anne enjoyed reading. Otto Frank used her original diary, known as "version A", and her edited version, known as "version B", to produce the first version for publication. Although he restored the true identities of his own family, he retained all of the other pseudonyms. Otto Frank gave the diary to the historian Annie Romein-Verschoor, who tried unsuccessfully to have it published. She then gave it to her husband Jan Romein, who wrote an article about it, titled "Kinderstem" ("A Child's Voice"), which was published in the newspaper Het Parool on 3 April 1946. He wrote that the diary "stammered out in a child's voice, embodies all the hideousness of fascism, more so than all the evidence at Nuremberg put together." His article attracted attention from publishers, and the diary was published in the Netherlands as Het Achterhuis (The Annex) in 1947, followed by five more printings by 1950. It was first published in Germany and France in 1950, and after being rejected by several publishers, was first published in the United Kingdom in 1952. The first American edition, published in 1952 under the title Anne Frank: The Diary of a Young Girl, was positively reviewed. The book was successful in France, Germany, and the United States, but in the United Kingdom it failed to attract an audience and by 1953 was out of print. Its most noteworthy success was in Japan, where it received critical acclaim and sold more than 100,000 copies in its first edition. In Japan, Anne Frank quickly was identified as an important cultural figure who represented the destruction of youth during the war. A play by Frances Goodrich and Albert Hackett based upon the diary premiered in New York City on 5 October 1955, and later won a Pulitzer Prize for Drama. It was followed by the film The Diary of Anne Frank (1959), which was a critical and commercial success. Biographer Melissa Müller later wrote that the dramatization had "contributed greatly to the romanticizing, sentimentalizing and universalizing of Anne's story." Over the years the popularity of the diary grew, and in many schools, particularly in the United States, it was included as part of the curriculum, introducing Anne Frank to new generations of readers.