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.

Example input: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Example output: Who believes Fagin's gang make wallets and handkerchiefs?.
Example explanation: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.
Q: Passage: In 1841, Solomon Northup is a free African-American man working as a violinist, living with his wife and two children in Saratoga Springs, New York. Two white men, Brown and Hamilton, offer him short-term employment as a musician if he will travel with them to Washington, D.C. However, once they arrive they drug Northup and deliver him to a slave pen run by a man named Burch. Northup proclaims that he is a free man, only to be savagely beaten with a wooden paddle and then a leather belt.
Northup is later shipped to New Orleans along with other captive African Americans. He is told by the others that if he wants to survive in the South, he must adapt to being a slave and not tell anyone he is a free man. A slave trader named Theophilus Freeman gives Northup the identity of "Platt", a runaway slave from Georgia, and sells him to plantation owner William Ford. Ford takes a liking to Northup and gives him a violin. However, tension grows between Northup and plantation carpenter John Tibeats which ends with Northup savagely beating and whipping Tibeats. Tibeats and his group try to hang Northup. Although they are not successful, Northup is left on the noose for hours before he is finally cut down. To save Northup's life, Ford sells him to another slave owner named Edwin Epps. In the process, Northup attempts to explain that he is actually a free man, but Ford tells him he is too afraid and that he cannot help him now.
A:
What city is Solomon Northup sold in?