Given the task definition, example input & output, solve the new input case.
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: 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.
Output: Who believes Fagin's gang make wallets and handkerchiefs?.
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.

New input case for you: Passage: In Frankfurt, Rose established herself as a teacher of English; her earnings were supplemented by contributions from John Grainger, who had settled in Perth. The Hoch Conservatory's reputation for piano teaching had been enhanced by the tenure, until 1892, of Clara Schumann as head of piano studies. Grainger's piano tutor was James Kwast, who developed his young pupil's skills to the extent that, within a year, Grainger was being lauded as a prodigy. Grainger had difficult relations with his original composition teacher, Iwan Knorr; he withdrew from Knorr's classes to study composition privately with Karl Klimsch, an amateur composer and folk-music enthusiast, whom he would later honour as "my only composition teacher".Together with a group of slightly older British students Roger Quilter, Balfour Gardiner, Cyril Scott and Norman O'Neill, all of whom became his friends Grainger helped form the Frankfurt Group. Their long-term objective was to rescue British and Scandinavian music from what they considered the negative influences of central European music. Encouraged by Klimsch, Grainger turned away from composing classical pastiches reminiscent of Handel, Haydn and Mozart, and developed a personal compositional style, the originality and maturity of which quickly impressed and astonished his friends. At this time Grainger discovered the poetry of Rudyard Kipling and began setting it to music; according to Scott, "No poet and composer have been so suitably wedded since Heine and Schumann."After accompanying her son on an extended European tour in the summer of 1900, Rose, whose health had been poor for some time, suffered a nervous collapse and could no longer work. To replace lost income, Grainger began giving piano lessons and public performances; his first solo recital was in Frankfurt on 6 December 1900. Meanwhile he continued his studies with Kwast, and increased his repertoire until he was confident he could support himself and his mother as a concert pianist. Having chosen London as his future base, in May 1901 Grainger abandoned his studies. With Rose, he left Frankfurt for the UK.Before leaving Frankfurt, Grainger had fallen in love with Kwast's daughter Mimi. In an autobiographical essay dated 1947, he says that he was "already sex-crazy" at this time, when he was 19. John Bird, Grainger's biographer, records that during his Frankfurt years, Grainger began to develop sexual appetites that were "distinctly abnormal"; by the age of 16 he had started to experiment in flagellation and other sado-masochistic practices, which he continued to pursue through most of his adult life. Bird surmises that Grainger's fascination with themes of punishment and pain derived from the harsh discipline to which Rose had subjected him as a child.
Output:
What was the full name of the composition teach John Grainger said he was "my only composition teacher"?