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.
Input: Passage: Tchaikovsky's early separation from his mother caused an emotional trauma that lasted the rest of his life and was intensified by her death from cholera in 1854, when he was fourteen. The loss of his mother also prompted Tchaikovsky to make his first serious attempt at composition, a waltz in her memory. Tchaikovsky's father, who had also contracted cholera but recovered fully, sent him back to school immediately in the hope that classwork would occupy the boy's mind. Isolated, Tchaikovsky compensated with friendships with fellow students that became lifelong; these included Aleksey Apukhtin and Vladimir Gerard. Music, while not an official priority at school, also bridged the gap between Tchaikovsky and his peers. They regularly attended the opera and Tchaikovsky would improvise at the school's harmonium on themes he and his friends had sung during choir practice. "We were amused," Vladimir Gerard later remembered, "but not imbued with any expectations of his future glory". Tchaikovsky also continued his piano studies through Franz Becker, an instrument manufacturer who made occasional visits to the school; however, the results, according to musicologist David Brown, were "negligible".In 1855, Tchaikovsky's father funded private lessons with Rudolph Kündinger and questioned him about a musical career for his son. While impressed with the boy's talent, Kündinger said he saw nothing to suggest a future composer or performer. He later admitted that his assessment was also based on his own negative experiences as a musician in Russia and his unwillingness for Tchaikovsky to be treated likewise. Tchaikovsky was told to finish his course and then try for a post in the Ministry of Justice.
Output:
What is the last name of the person whose mother died of cholera?