Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Passage: Charismatic roving peddler Hank Martin falls in love at first sight with schoolteacher Verity Wade and soon marries her. On their wedding day, he rents a ramshackle home from his upper class lawyer friend Jules Bolduc. Hank rounds up some of his many friends to fix up the place, but Verity begins to realize that he is not as nice as he appears to be; while they do the work, he sees nothing wrong in going inside to read a law book. He confides to her that it is all a matter of manipulating people the right way.
Jules invites the couple to dine with him that night, but Hank soon quarrels with another guest, Robert L. Castleberry IV. He accuses Castleberry, the owner of the company that buys cotton, of shortchanging the poor farmers.
When Hank goes about his business, Verity accompanies him to the bayou. A young woman named Flamingo leaps into his arms, but when she learns that he is now married, she tries to arrange for an alligator to rid her of her rival. Verity is only injured.  However, Flamingo does not give up on the man she has loved since she was a teen. After Hank sends Verity home to recover, Flamingo tracks Hank down on the road. She overcomes his resistance, and they start an affair.
Hank sets out to prove that Castleberry is cheating. When Hank proves that the weights used are seriously inaccurate, one of Castleberry's men aims a rifle at one of Hank's followers, and is killed by farmer Jeb Brown.
Student:
What is the full name of the man that accuses the owner of the cotton buying company of shortchanging farmers?