Definition: 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: In Bedrock, Slate International's vice president Cliff Vandercave and his secretary Miss Stone discuss their plan to swindle the company of its vast fortune and flee. As part of the plan, they would need one of the employees to be the scapegoat. Meanwhile, Fred Flintstone loans his best friend and neighbor Barney Rubble money so that he and his wife Betty can adopt a child. The agency pairs them up with a child named Bamm-Bamm, who can only pronounce his own name. Although Bamm-Bamm is initially difficult to control due to being raised by mastodons, and thus has super strength, he eventually warms up to his new family. Barney vows to repay his friend Fred for his debt of gratitude. Despite his mother-in-law Pearl Slaghoople's objections, Fred's wife Wilma remains supportive of Fred's decision to help Barney. Fred promises he will prove himself to her one day.
Output:
Who are the last names of the people who need a scapegoat?