In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
--------
Question: Passage: Sassari is located in north-western Sardinia, at above sea level. The area rises up on a wide karstic plateau that slopes gently down towards the Gulf of Asinara and the Nurra plain. The city is surrounded by a green belt of thousands of hectares of olive plantations, which from the 19th century have partly replaced the mixed woodlands of oak and other Mediterranean trees as well as the maquis shrubland. The thinly populated Nurra Plain, located to the west, occupies the main part of the region of Sassari, while the urban agglomeration, with a population of about 275,000 inhabitants, is located to the south east. The abundance of water, with about 400 springs and artesian wells, has made for much development of horticulture over the centuries.
 Link Information: none Answer: none

Answer: Are olives the largest export in Sassari?


Question: Passage: A.P. Rosengolts was born in Vitebsk on November 4, 1889. He was the son of a Jewish merchant. He joined the Bolshevik faction of the Russian Social-Democratic Workers' Party (RSDRP) in 1905, the year of the first, abortive Russian Revolution. He worked as an insurance agent and carried out work for the Bolshevik party in Vitebsk, Kiev, Ekaterinoslav and Moscow. Rosengolts played an active role in the Revolution of 1917. He was a member of the Executive Committee of the Moscow City Council, the Moscow Military-Revolutionary Committee and the All-Russian Military-Revolutionary Committee. He was a leading officer in the Red Army and, during the Russian Civil War, worked closely with L.D. Trotsky. After the Civil War, Rosengolts worked successively for the Commissariats of Transportation and Finance and the Directorate of the Red Army Air Force. He served as ambassador to Britain from 1925 to 1927 and oversaw Soviet espionage in Britain. He became a member of the Central Committee of the Communist Party of the Soviet Union in 1927 and held various high positions in the Communist Party and the Soviet government. In 1930 he was appointed People's Commissar of Foreign Trade. On June 14, 1937, Rosengolts was dismissed from this office and on October 7, 1937, he was arrested. He was one of the defendants of the third Moscow Trial, along with Nikolai Bukharin, Alexey Rykov and other prominent Soviet officials. The accused faced a long list of capital charges, including plotting to assassinate Lenin and Stalin, espionage and sabotage. Like most of his co-defendants, Rosengolts confessed. He was convicted, sentenced to death and shot on March 15, 1938 in Moscow. He was rehabilitated in 1988.
 Link Information: Leon Trotsky (; born Lev Davidovich Bronstein; – 21 August 1940 Answer: 1940

Answer: What year did Trotsky die?


Question: Passage: On March 2, 2012, Brown released the first episode of his Fortune web series, showing him backstage at the 2012 Lo Nuestro Awards where he performed "International Love" with Pitbull, playing in a celebrity basketball game during NBA All-Star Weekend in Orlando with rappers Common, 50 Cent, T.I., and singer R. Kelly, as well as partying and dancing at the club. In April 2012, Brown appeared in Australia as one of the performing acts for the urban music festival, Supafest. His set list composed of thirteen songs, which were "Turn Up the Music", "Till I Die", "Run It!", "Deuces", "Yeah 3x", "Look at Me Now", "Beautiful People", "She Ain't You", "Wet the Bed", "My Last", "Body 2 Body" and "Birthday Cake". On May 8, 2012, Brown appeared on Dancing with the Stars (US) to perform "Turn Up the Music". For the performance, Brown and his dancers wore suits. He later performed the song at the 2012 Billboard Music Awards, held at the MGM Grand Garden Arena in Paradise, Nevada on May 20, 2012. The performance featured projected images on the stage backdrop and BMX bike stunt troupes racing around the stage, as Brown performed choreographed routines while lip synching. His performance was met with a mixed response from celebrities, most notably Joe Jonas, Pink, and Carey Hart, who all criticized the singer for lip synching. On June 8, 2012, Brown appeared on NBC's Today show and performed "Turn Up the Music", "Don't Wake Me Up", "Yeah 3x" and "Forever", as part of the program's "Summer Concert Series". At the 2012 BET Awards on July 1, 2012, he performed a medley of "Turn Up the Music" and "Don't Wake Me Up", and appeared shirtless for the performance with half his body spray painted in grey. Brown performed acrobatic moves with six backup dancers "under triangle-shaped beams" as green and red flashing lights appeared throughout the stage.
 Link Information: none Answer: none

Answer:
Who else performed at Supfest the same year Chris Brown made his appearance?