Background: Tristan Tzara (French: [tRista dzaRa]; Romanian: [tris'tan 'tsara]; born Samuel or Samy Rosenstock, also known as S. Samyro; April 16 [O.S. April 4] 1896 - December 25, 1963) was a Romanian and French avant-garde poet, essayist and performance artist. Also active as a journalist, playwright, literary and art critic, composer and film director, he was known best for being one of the founders and central figures of the anti-establishment Dada movement. Under the influence of Adrian Maniu, the adolescent Tzara became interested in Symbolism and co-founded the magazine Simbolul with Ion Vinea (with whom he also wrote experimental poetry) and painter Marcel Janco. During World War I, after briefly collaborating on Vinea's Chemarea, he joined Janco in Switzerland.
Context: S. Samyro, a partial anagram of Samy Rosenstock, was used by Tzara from his debut and throughout the early 1910s. A number of undated writings, which he probably authored as early as 1913, bear the signature Tristan Ruia, and, in summer of 1915, he was signing his pieces with the name Tristan. In the 1960s, Rosenstock's collaborator and later rival Ion Vinea claimed that he was responsible for coining the Tzara part of his pseudonym in 1915. Vinea also stated that Tzara wanted to keep Tristan as his adopted first name, and that this choice had later attracted him the "infamous pun" Triste Ane Tzara (French for "Sad Donkey Tzara"). This version of events is uncertain, as manuscripts show that the writer may have already been using the full name, as well as the variations Tristan Tara and Tr. Tzara, in 1913-1914 (although there is a possibility that he was signing his texts long after committing them to paper). In 1972, art historian Serge Fauchereau, based on information received from Colomba, the wife of avant-garde poet Ilarie Voronca, recounted that Tzara himself had explained his chosen name was a pun in Romanian, trist in tara, meaning "sad in the country"; Colomba Voronca was also dismissing rumors that Tzara had selected Tristan as a tribute to poet Tristan Corbiere or to Richard Wagner's Tristan und Isolde opera. Samy Rosenstock legally adopted his new name in 1925, after filing a request with Romania's Ministry of the Interior. The French pronunciation of his name has become commonplace in Romania, where it replaces its more natural reading as tara ("the land", Romanian pronunciation: ['tsara]). Tzara was born in Moinesti, Bacau County, in the historical region of Western Moldavia. His parents were Jewish Romanians who reportedly spoke Yiddish as their first language; his father Filip and grandfather Ilie were entrepreneurs in the forestry business. Tzara's mother was Emilia Rosenstock, nee Zibalis. Owing to the Romanian Kingdom's discrimination laws, the Rosenstocks were not emancipated, and thus Tzara was not a full citizen of the country until after 1918. He moved to Bucharest at the age of eleven, and attended the Schemitz-Tierin boarding school. It is believed that the young Tzara completed his secondary education at a state-run high school, which is identified as the Saint Sava National College or as the Sfantul Gheorghe High School. In October 1912, when Tzara was aged sixteen, he joined his friends Vinea and Marcel Janco in editing Simbolul. Reputedly, Janco and Vinea provided the funds. Like Vinea, Tzara was also close to their young colleague Jacques G. Costin, who was later his self-declared promoter and admirer. Despite their young age, the three editors were able to attract collaborations from established Symbolist authors, active within Romania's own Symbolist movement. Alongside their close friend and mentor Adrian Maniu (an Imagist who had been Vinea's tutor), they included N. Davidescu, Alfred Hefter-Hidalgo, Emil Isac, Claudia Millian, Ion Minulescu, I. M. Rascu, Eugeniu Sperantia, Al. T. Stamatiad, Eugeniu Stefanescu-Est, Constantin T. Stoika, as well as the journalist and lawyer Poldi Chapier. In its inaugural issue, the journal even printed a poem by one of the leading figures in Romanian Symbolism, Alexandru Macedonski. Simbolul also featured illustrations by Maniu, Millian and Iosif Iser. Although the magazine ceased print in December 1912, it played an important part in shaping Romanian literature of the period. Literary historian Paul Cernat sees Simbolul as a main stage in Romania's modernism, and credits it with having brought about the first changes from Symbolism to the radical avant-garde. Also according to Cernat, the collaboration between Samyro, Vinea and Janco was an early instance of literature becoming "an interface between arts", which had for its contemporary equivalent the collaboration between Iser and writers such as Ion Minulescu and Tudor Arghezi. Although Maniu parted with the group and sought a change in style which brought him closer to traditionalist tenets, Tzara, Janco and Vinea continued their collaboration. Between 1913 and 1915, they were frequently vacationing together, either on the Black Sea coast or at the Rosenstock family property in Garceni, Vaslui County; during this time, Vinea and Samyro wrote poems with similar themes and alluding to one another. Tzara's career changed course between 1914 and 1916, during a period when the Romanian Kingdom kept out of World War I. In autumn 1915, as founder and editor of the short-lived journal Chemarea, Vinea published two poems by his friend, the first printed works to bear the signature Tristan Tzara. At the time, the young poet and many of his friends were adherents of an anti-war and anti-nationalist current, which progressively accommodated anti-establishment messages. Chemarea, which was a platform for this agenda and again attracted collaborations from Chapier, may also have been financed by Tzara and Vinea. According to Romanian avant-garde writer Claude Sernet, the journal was "totally different from everything that had been printed in Romania before that moment." During the period, Tzara's works were sporadically published in Hefter-Hidalgo's Versuri si Proza, and, in June 1915, Constantin Radulescu-Motru's Noua Revista Romana published Samyro's known poem Verisoara, fata de pension ("Little Cousin, Boarding School Girl"). Tzara had enrolled at the University of Bucharest in 1914, studying mathematics and philosophy, but did not graduate. In autumn 1915, he left Romania for Zurich, in neutral Switzerland. Janco, together with his brother Jules, had settled there a few months before, and was later joined by his other brother Georges. Tzara, who may have applied for the Faculty of Philosophy at the local university, shared lodging with Marcel Janco, who was a student at the Technische Hochschule, in the Altinger Guest House (by 1918, Tzara had moved to the Limmatquai Hotel). His departure from Romania, like that of the Janco brothers, may have been in part a pacifist political statement. After settling in Switzerland, the young poet almost completely discarded Romanian as his language of expression, writing most of his subsequent works in French. The poems he had written before, which were the result of poetic dialogues between him and his friend, were left in Vinea's care. Most of these pieces were first printed only in the interwar period. It was in Zurich that the Romanian group met with the German Hugo Ball, an anarchist poet and pianist, and his young wife Emmy Hennings, a music hall performer. In February 1916, Ball had rented the Cabaret Voltaire from its owner, Jan Ephraim, and intended to use the venue for performance art and exhibits. Hugo Ball recorded this period, noting that Tzara and Marcel Janco, like Hans Arp, Arthur Segal, Otto van Rees, Max Oppenheimer, and Marcel Slodki, "readily agreed to take part in the cabaret." According to Ball, among the performances of songs mimicking or taking inspiration from various national folklores, "Herr Tristan Tzara recited Rumanian poetry." In late March, Ball recounted, the group was joined by German writer and drummer Richard Huelsenbeck. He was soon after involved in Tzara's "simultaneist verse" performance, "the first in Zurich and in the world", also including renditions of poems by two promoters of Cubism, Fernand Divoire and Henri Barzun. CANNOTANSWER
Question: what happened in 1915

Answer:

Constantin Radulescu-Motru's Noua Revista Romana published Samyro's known poem Verisoara,