Task: Question Generation
Input (English): Passage: By 1930, Szigeti was established as a major international concert violinist. He performed extensively in Europe, the United States and Asia, and made the acquaintance of many of the era's leading instrumentalists, conductors and composers.
In 1939, to escape the war and Nazi persecution of the Jews, Szigeti emigrated with his wife to the United States, where they settled in California. (A year later, Bartók also fled to America, and just two days after his arrival, he and Szigeti played a sonata recital at the Library of Congress in Washington, D.C.)During the 1930s, 1940s and into the 1950s, Szigeti recorded extensively, leaving a significant legacy.  Notable recordings include the above-mentioned Library of Congress sonata recital; the studio recording of Bartók's Contrasts with Benny Goodman on clarinet and the composer at the piano; the violin concertos of Beethoven, Brahms, Mendelssohn, Prokofiev (No. 1) and Bloch under the batons of such conductors as Bruno Walter, Hamilton Harty and Sir Thomas Beecham; and various works by J.S. Bach, Busoni, Corelli, Handel and Mozart. One of his last recordings was of the Six Sonatas and Partitas for solo violin by Bach; although his technique had deteriorated noticeably by that time, the recording is prized for Szigeti's insight and depth of interpretation.In 1950, Szigeti was detained at Ellis Island upon returning from a European concert tour and was held for several days, officially "temporarily excluded" from the country. The reasons for his detention remain unclear. The following year, he became a naturalized American citizen.
Output (English): What is the last name of the person who was detained for unclear reasons?