Detailed 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.
Problem:Passage: With the help of his Peruvian friend Ricardo, Oliver, an American hedge fund banker, buys debts owed by the Peruvian government to landowners.  Though the deals are lucrative, Ricardo has lingering doubts about whether they are helping Peruvians.  At the same time, Maria, a nurse at an underfunded hospital in Lima, cares for her elderly, ailing mother, Gloria.  Though Gloria needs hospital care, Maria can not convince her superior, Dr. Cerrón, to admit her, as Gloria's illness is not life-threatening.  In the Andes, a mountain farmer, Florentino, struggles to convince his neighbors not to sell their ancestral land to Caravedo, a developer who has promised to bring modernization and jobs to the area.  Florentino has a strained relationship with his son, Diego, who dreams of being a pilot.
Oliver's boss, Nathan, tells him they need to pull out of Peru, as the company needs an immediate influx of money.  Stunned, Oliver insists Nathan give him time to close a potential deal with Caravedo that could solve their problems.  Nathan gives him one week.  Though his family is distraught that he is returning again to Peru, Oliver tells his wife he must close the deal or all of their previous sacrifices will be for nothing.  Oliver recruits Ricardo to research Caravedo.  After Oliver aggressively pressures the Peruvian finance minister to repay debts, Ricardo walks away from the Caravedo deal.  He returns shortly but demands Oliver promise to abort any potential deals with Caravedo if they turn out to be exploitative.
Solution:
What is the mountain farmer's son named?