In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Example input: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Example output: Who believes Fagin's gang make wallets and handkerchiefs?.
Example explanation: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.
Q: Passage: Critical opinion as to the merit of The Oceanides has been overwhelmingly positive, and today the piece is counted among Sibelius's masterpieces. Following the 1914 premiere, Olin Downes, the American music critic and Sibelius devotee, described the new work as "the finest evocation of the sea which has ever been produced in music", praising the composer for his "extraordinarily developed feeling for form, proportion and continuity". Downes furthermore assessed Sibelius's Norfolk concert as just the third time since 1900 that he had "felt himself in the presence of a genius of world class" (the other two being Richard Strauss in 1904 and Arturo Toscanini in 1910). An unsigned review in the New York Tribune (almost certainly penned by critic Henry Krehbiel) found the new work "fresh and vital, full of imagination and strong in climax". He continues:
Extremists will probably deplore the fact that the composer is still a respecter of form, still a devotee of beauty, still a believer in the potency of melody; but this is rather a matter for congratulation than regret ... Mr. Sibelius is a fine musical constructionist, an eloquent harmonist and a fine colorist despite his fondness for dark tints.
The influential Swedish critic Wilhelm Peterson-Berger, always a thorn in Sibelius's side and whom the composer had once mocked as "his lordship", required some three encounters with The Oceanides before warming to the new symphonic poem: after hearing the Stockholm Concert Society under Sibelius in 1923, Peterson-Berger at last embraced the piece. "The Oceanides was totally and completely different from three years ago under Schnéevoigt", he wrote. "In this beautiful poem one really heard something of the sound of the Aegean Sea and of Homer".
A:
What is the name of the person that was described as a genius of world class?