Detailed Instructions: 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.
Q: Passage: With the encouragement of his parents, Ravel applied for entry to France's most important musical college, the Conservatoire de Paris. In November 1889, playing music by Chopin, he passed the examination for admission to the preparatory piano class run by Eugène Anthiome. Ravel won the first prize in the Conservatoire's piano competition in 1891, but otherwise he did not stand out as a student.   Nevertheless, these years were a time of considerable advance in his development as a composer. The musicologist Arbie Orenstein writes that for Ravel the 1890s were a period "of immense growth ... from adolescence to maturity." 
In 1891 Ravel progressed to the classes of Charles-Wilfrid de Bériot, for piano, and Émile Pessard, for harmony. He made solid, unspectacular progress, with particular encouragement from Bériot but, in the words of the musical scholar Barbara L. Kelly, he "was only teachable on his own terms". His later teacher Gabriel Fauré understood this, but it was not generally acceptable to the conservative faculty of the Conservatoire of the 1890s. Ravel was expelled in 1895, having won no more prizes. His earliest works to survive in full are from these student days: Sérénade grotesque, for piano, and "Ballade de la Reine morte d'aimer", a mélodie setting a poem by Roland de Marès (both 1893).Ravel was never so assiduous a student of the piano as his colleagues such as Viñes and Cortot were. It was plain that as a pianist he would never match them, and his overriding ambition was to be a composer. From this point he concentrated on composition. His works from the period include the songs "Un grand sommeil noir" and "D'Anne jouant de l'espinette" to words by Paul Verlaine and Clément Marot, and the piano pieces Menuet antique and Habanera (for four-hands), the latter eventually incorporated into the Rapsodie espagnole. At around this time, Joseph Ravel introduced his son to Erik Satie, who was earning a living as a café pianist. Ravel was one of the first musicians – Debussy was another – who recognised Satie's originality and talent. Satie's constant experiments in musical form were an inspiration to Ravel, who counted them "of inestimable value".
A:
What is the name of the person who Barbara L. Kelly states was only teachable on his own terms?