Definition: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Input: Question: How many years had the Cold War been going on at this point? Passage 1:In 1918, Seymour met Victor Heerman. Heerman directed a screen test featuring Seymour and one of D.W. Griffith's Artcraft stock company actors Robert Harron. Griffith was pleased with the pairing and with Seymour's knack for light comedy and hired her as member of his stock company. Griffith cast Seymour with Harron, Richard Barthelmess and Carol Dempster in the drama The Girl Who Stayed at Home (1919). Although the film was not well received by critics, Seymour's performance was and the public interest in her began to grow. Later that year, she was paired with Robert Harron again in True Heart Susie (1919) which also featured Lillian Gish. Seymour followed with role in Scarlet Days (1919), also opposite Richard Barthelmess and Carol Dempster. In 1920, Griffith cast Seymour in the lead role in The Idol Dancer. The film was not well received by audiences but they were taken by Seymour's performance. Shortly after the film's release, Seymour was featured on the cover of Motion Picture Magazine.
Passage 2:It is unclear where or when de los Heros started his playing career but in 1932 he was playing for Barakaldo FC. In 1934 he moved to Sevilla FC. Late in 1936 he joined Gimnastico de Valencia. In 1937, in the middle of the Spanish Civil War, he joined Barcelona FC. His first game for them was on the 16 May 1937 against the Catalan national team. He never actually played for them in the domestic league but participated in the Barcelona FC tour of North America later in 1937. When the tour ended he signed for Brooklyn Hispano, a United States team that played in the American Soccer League. Later he moved to Mexico where he played for Club Deportivo Euzkadi in the Primera Fuerza league for the 1938/39 season. He also played for the Basque Country national football team twice during that period. Later he joined Club Espana, before going on to play in several other Mexican teams.
Passage 3:During the presidential campaign of 1948, as Cold War fears of communist global expansion mounted, critics of the Truman administration heatedly raised the question "Who Lost China?." Criticism mounted after Truman's surprising victory in the election as the Communist Party of China led by Mao Zedong steadily defeated Chinese Nationalist armies of Chiang Kai-shek and was winning the Chinese Civil War. In November 1948 John Paton Davies proposed a collection of documents to explain and defend American policy in China to the American public, an idea that Secretary of State Dean Acheson ordered his staff to prepare. The group was headed by the Director of the Far Eastern Division, Walton Butterworth but much of the work was done by John F. Melby, who had served for the State Department in the Soviet Union and China during the war, and by Charles Yost. The 1054 page volume was published August 1949, as Mao and his retinue waited outside the city of Beiping, as Beijing was then called,

Output:
3