IN: Daniel Barenboim (born 15 November 1942) is an Argentine-Israeli pianist and conductor who is a citizen of Argentina, Israel, Palestine, and Spain. He is the general music director of the Berlin State Opera, and the Staatskapelle Berlin; he previously served as Music Director of the Chicago Symphony Orchestra, the Orchestre de Paris and La Scala in Milan. Barenboim is known for his work with the West-Eastern Divan Orchestra, a Seville-based orchestra of young Arab and Israeli musicians, and as a resolute critic of the Israeli occupation of Palestinian territories. Barenboim has received many awards and prizes, including an honorary Knight Commander of the Order of the British Empire, France's Legion d'honneur both as a Commander and Grand Officier, and the German Grosses Bundesverdienstkreuz and Willy Brandt Award.

In the beginning of his career, Barenboim concentrated on music of the classical era, as well as some romantic composers. He made his first recording in 1954. Notable classical recordings include the complete cycles of Mozart, Beethoven and Schubert's piano sonatas, and Mozart's piano concertos (in the latter, taking part as both soloist and conductor). Romantic recordings include Brahms's piano concertos (with John Barbirolli), Mendelssohn's Songs Without Words, and Chopin's nocturnes. Barenboim also recorded many chamber works, especially in collaboration with his first wife, Jacqueline du Pre, the violinist Itzhak Perlman, and the violinist and violist Pinchas Zukerman. Noted performances include: the complete Mozart violin sonatas (with Perlman), Brahms's violin sonatas (live concert with Perlman, previously in the studio with Zukerman), Beethoven's and Brahms's cello sonatas (with du Pre), Beethoven's and Tchaikovsky's piano trios (with du Pre and Zukerman), and Schubert's Trout Quintet (with du Pre, Perlman, Zukerman, and Zubin Mehta).  Notable recordings as a conductor include: the complete symphonies of Beethoven, Brahms, Bruckner, Schubert and Schumann, the Da Ponte operas of Mozart, numerous operas by Wagner, including the complete Ring Cycle, and various concertos. Barenboim has written about his changing attitude to the music of Mahler; he has recorded Mahler's Fifth, Seventh and Ninth symphonies and Das Lied von der Erde. He has also performed and recorded the Concierto de Aranjuez by Rodrigo and Villa-Lobos guitar concerto with John Williams as the guitar soloist.  By the late 1990s, Barenboim had widened his concert repertoire, performing works by baroque as well as twentieth-century classical composers. Examples include: J.S. Bach's The Well-Tempered Clavier (which he has played since childhood) and Goldberg Variations, Albeniz's Iberia, and Debussy's Preludes. In addition, he turned to other musical genres, such as jazz, and the folk music of his birthplace, Argentina. He conducted the 2006 New Year's Eve concert in Buenos Aires, in which tangos were played.  Barenboim has continued to perform and record chamber music, sometimes with members of the orchestras he has led. Some examples include the Quartet for the End of Time by Messiaen with members of the Orchestre de Paris during his tenure there, Richard Strauss with members of the Chicago Symphony Orchestra, and Mozart's Clarinet Trio with members of the Berlin Staatskapelle.  To mark Barenboim's 75th birthday, Deutsche Grammophon released a box set of 39 CDs of his solo recordings, and Sony Classical issued a box set of Barenboim's orchestral recordings on 43 CDs and three DVDs in 2017, Daniel Barenboim - A Retrospective.

What are some of his significant performances?

OUT: He has also performed and recorded the Concierto de Aranjuez by Rodrigo and Villa-Lobos guitar concerto with John Williams as the guitar soloist.

input: Seven-year-old Bok was captured by Giemma, a member of the slave hunting militia, who forced him to join a caravan of slaves, stolen produce, livestock and wares that the militia had captured in their raid of the Dinka settlement. When the members of the militia split up to return to their homes, Bok was taken by Giemma. Upon arriving at Giemma's residence, Francis was beaten by his captor's children with sticks and was called abeed. The word literally means "slave" and the stereotype is that of an inferior, demeaned, Negroid race. Francis was given quarters in a hovel near the pens of Giemma's livestock.  Bok began a ten-year period of slavery at the hands of Giemma and his son Hamid. He was forced to tend the family's herds of livestock. He had to take them to pastures in the area and to local watering holes, where he saw other Dinka boys who were also forced to tend herds of livestock. He began to suspect that his life was going to change forever and that his father was not going to be able to save him. His attempts to speak to the other Dinka boys were futile, as they were speaking Arabic, which he could not understand; they also seemed afraid to speak to him.  According to Bok, as he grew older, Giemma and Hamid began to place more trust in his abilities as a herdsman. Care of the cattle, horses and camels was passed to Bok and he was able to spend more time alone with the animals. Previously he had been under the careful supervision of Hamid and sometimes Giemma. In addition to having him serve as his slave, Giemma forced Francis to convert to Islam and to take the Arabic name of Abdul Rahman, meaning "servant of the compassionate one." In his autobiography, Francis states that although he was forced to convert to Islam, that he never stopped praying to God for strength to get him through his ordeal.  Bok tried twice to flee from slavery at the age of 14. The first instance happened early one morning after he had been sent out with the cattle. Bok blindly ran down a road for several miles before he was captured by one of Giemma's fellow militia members. Giemma's peer returned Francis to the Giemma's compound, where he was beaten with a bullwhip. Bok attempted to escape once again just two days later, when he fled in the opposite direction of his previous escape. He once again fled for several miles, this time keeping to the forest. He stopped for water at a local stream crossing, where he was spotted by Giemma who happened to be there as well. Giemma forced Francis back to his home, this time promising to kill him. Francis was beaten again, but Giemma chose not to kill him, as Francis had become too valuable to the family as a slave.

Answer this question "How long was he forced to do this?"
output:
ten-year period of slavery