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: Everything's going well at Disco Records, where singer Johnny Conroy is popular and publicity chief Marty Collins is good at her job, as well as in love with company boss Mack Adams.
Everything changes when Barney Pearl shows up. Pearl is a crude businessman who supplies records to jukeboxes coast-to-coast. He demands to be made a full partner in Disco Records or he will yank their discs out of jukes everywhere. Furthermore, he insists that singer girlfriend Mona De Luce gets to make a record of her own.
Implored not to agree, Mack goes along. Pearl keeps the pressure on, renaming the company after himself. Johnny quits and leaves on his sailboat for points unknown. Mona, meanwhile, is a much better singer than expected. Her record is a smash hit, annoying Barney, who wants her wholly dependent on him. Barney demands her career come to an end.
Marty, Mack and Mona all travel to the West Indies, where Johnny is now enjoying the sun, fun and music. Johnny suggests they begin recording calypso songs. It all works out perfectly, and when Pearl tries to cut himself in, they find a way to keep him out.
A:
What is the last name of the person who demands to be made a full partner?