In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.
Example: 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.
Question: Who believes Fagin's gang make wallets and handkerchiefs?
Example solution: Oliver.
Example explanation: In the sentence "He believes they make wallets and handkerchiefs", the pronoun "he" refers to name "Oliver".

Problem: Passage: The film opens with Sir John Falstaff and Justice Shallow walking through the snow, then to a warm fire inside the Boar's Head Tavern, as the two reminisce. After a main credit sequence, the narrator explains that King Henry IV of England has succeeded Richard II, whom he has killed. Richard II's true heir, Edmund Mortimer, is a prisoner in Wales, and Mortimer's cousins Northumberland, Worcester, and Northumberland's son Hotspur demand that Henry rescue Mortimer. The king refuses, and thus Mortimer's cousins begin to plot Henry's overthrow.
To Henry's great dissatisfaction, his son Prince Hal spends most of his time at the Boar's Head Tavern, drinking and carousing with prostitutes, thieves and other criminals under John Falstaff's patriarchal influence. Falstaff insists that he and Hal should think of themselves as gentlemen, but Hal warns Falstaff that he will one day reject both this lifestyle and Falstaff. The next morning Hal, Falstaff, Bardolph, Peto, and Poins disguise themselves in Gadshill to prepare to rob a group of traveling pilgrims. After Falstaff, Bardolph, and Peto rob the pilgrims, Hal and Poins jump out in disguises and take the stolen treasure from Falstaff as a joke.
Back at the Boar's Head Tavern, Falstaff begins to tell Hal and Poins with increasing exaggeration the story of how the money was stolen from him. Hal and Poins poke holes in Falstaff's tale until they reveal their joke to the entire group. In celebration of the newly recovered stolen treasure, Falstaff and Hal take turns impersonating Henry, with a cooking pot crown and vocal impressions. Falstaff's Henry chastises Hal for spending his time with common criminals, but names Sir John Falstaff as his one virtuous friend. Hal's Henry calls Falstaff a "misleader of youth".
Question: Who begins to plot to overthrow a king?
Solution: Northumberland.