question:  What is the relationship between Paul and Rupert?
context: One can't be too cautious about the people one meets in Tangier. The Place de France is the town's hub. It marks the end of Boulevard Pasteur, the main drag of the westernized part of the city, and the beginning of Rue de la Liberté, which leads down to the Grand Socco and the medina. King-size sidewalk cafes occupy three of the strategic corners on the Place de France. The Cafe de Paris serves the best draft beer in town, gets all the better custom, and has three shoeshine boys attached to the establishment. You can sit of a sunny morning and read the Paris edition of the New York Herald Tribune while getting your shoes done up like mirrors for thirty Moroccan francs which comes to about five cents at current exchange. In native costume you'll see Berber and Rif, Arab and Blue Man, and occasionally a Senegalese from further south. In European dress you'll see Japs and Chinese, Hindus and Turks, Levantines and Filipinos, North Americans and South Americans, and, of course, even Europeans—from both sides of the Curtain. In Tangier you'll find some of the world's poorest and some of the richest. The poorest will try to sell you anything from a shoeshine to their not very lily-white bodies, and the richest will avoid your eyes, afraid you might try to sell them something. As a result of them the permanent population includes smugglers and black-marketeers, fugitives from justice and international con men, espionage and counter-espionage agents, homosexuals, nymphomaniacs, alcoholics, drug addicts, displaced persons, ex-royalty, and subversives of every flavor. Local law limits the activities of few of these. Paul said, "How are you, Rupert? Paul said, "What ever happened to those poxy flying saucers?" A French girl went by with a poodle so finely clipped as to look as though it'd been shaven. Tapas at the Cafe de Paris are apt to be potato salad, a few anchovies, olives, and possibly some cheese.
output:  They are acquaintances. They met in Tangier.
options:  They are two Americans who happen to meet in Tangier.  They are friends from Liverpool, vacationing in Tangier.  They play cards together in Tangier.  They are acquaintances. They met in Tangier.