Task: Question Generation
Input (English): Passage: In 1861, it was announced that a Provisional Theatre would be built in Prague, as a home for Czech opera. Smetana saw this as an opportunity to write and stage opera that would reflect Czech national character, similar to the portrayals of Russian life in Mikhail Glinka's operas. He hoped that he might be considered for the theatre's conductorship, but the post went to Jan Nepomuk Maýr, apparently because the conservative faction in charge of the project considered Smetana a "dangerous modernist", in thrall to avant garde composers such as Liszt and Wagner. Smetana then turned his attention to an opera competition, organised by Count Jan von Harrach, which offered prizes of 600 gulden each for the best comic and historical operas based on Czech culture. With no useful model on which to base his work—Czech opera as a genre scarcely existed—Smetana had to create his own style. He engaged Karel Sabina, his comrade from the 1848 barricades, as his librettist, and received Sabina's text in February 1862, a story of the 13th century invasion of Bohemia by Otto of Brandenburg. In April 1863 he submitted the score, under the title of The Brandenburgers in Bohemia.
At this stage in his career, Smetana's command of the Czech language was poor. His generation of Czechs was educated in German, and he had difficulty expressing himself in what was supposedly his native tongue. To overcome these linguistic deficiencies he studied Czech grammar, and made a point of writing and speaking in Czech every day. He had become Chorus Master of the nationalistic Hlahol Choral Society soon after his return from Sweden, and as his fluency in the Czech language developed he composed patriotic choruses for the Society; The Three Riders and The Renegade were performed at concerts in early 1863. In March of that year Smetana was elected president of the music section of Umělecká Beseda, a society for Czech artists. By 1864 he was proficient enough in the Czech language to be appointed as music critic to the main Czech language newspaper Národní listy. Meanwhile, Bettina had given birth to another daughter, Božena.On 23 April 1864, Smetana conducted Berlioz's choral symphony Roméo et Juliette at a concert celebrating the Shakespeare tercentenary, adding to the programme his own March for the Shakespearean Festival. That year, Smetana's bid to become Director of the Prague Conservatory failed. He had set high hopes on this appointment: "My friends are trying to persuade me that this post might have been especially created for me," he wrote to a Swedish friend. Again his hopes were thwarted by his association with the perceived radical Liszt, and the appointing committee chose the conservative patriot Josef Krejčí for the post.
Output (English): What choral symphony did the man that submitted the score "The Brandenburgers in Bohemia" perform in April 1864?