You will be given a definition of a task first, then some input of the task.
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.

Passage: Holst made some recordings, conducting his own music. For the Columbia company he recorded Beni Mora, the Marching Song and the complete Planets with the London Symphony Orchestra (LSO) in 1922, using the acoustic process. The limitations of early recording prevented the gradual fade-out of women's voices at the end of "Neptune", and the lower strings had to be replaced by a tuba to obtain an effective bass sound. With an anonymous string orchestra Holst recorded the St Paul's Suite and Country Song in 1925. Columbia's main rival, HMV, issued recordings of some of the same repertoire, with an unnamed orchestra conducted by Albert Coates. When electrical recording came in, with dramatically improved recording quality, Holst and the LSO re-recorded The Planets for Columbia in 1926.In the early LP era little of Holst's music was available on disc. Only six of his works are listed in the 1955 issue of The Record Guide: The Planets (recordings under Boult on HMV and Nixa, and another under Sir Malcolm Sargent on Decca); the Perfect Fool ballet music; the St Paul's Suite; and three short choral pieces. In the stereo LP and CD eras numerous recordings of The Planets were issued, performed by orchestras and conductors from round the world. By the early years of the 21st century most of the major and many of the minor orchestral and choral works had been issued on disc. The 2008 issue of The Penguin Guide to Recorded Classical Music contained seven pages of listings of Holst's works on CD. Of the operas, Savitri, The Wandering Scholar, and At the Boar's Head have been recorded.
Output:
What is the last name of the person of whose works only six are listed in the 1955 issue of The Record Guide?