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.
One 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.
Solution is here: Who believes Fagin's gang make wallets and handkerchiefs?.
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.

Now, solve this: Passage: The saddest sight was seeing people behind the wire fences on both sides of the land frontier yelling at the top of their voices across the wide dividing space to enquire about the state of relatives, as telephone communications had been cut by the Spaniards. Local housewives with Spanish relatives in the Campo area kept their radios tuned to the nearby Spanish stations for news of family members who were gravely ill. In critical cases the parties concerned would rush to Spain via Tangiers but unfortunately sometimes the patient was dead and buried by the time they arrived. The Spanish authorities would not allow access across the land frontier even on compassionate grounds.
Franco's death in 1975 led to the beginnings of diplomatic movement between Britain and Spain on the Gibraltar issue, though not immediately. Spain applied to join the European Economic Community (EEC) and NATO, for which it needed British support. In 1980, talks between British and Spanish ministers led to the Lisbon Agreement, a statement on co-operation between the two countries which committed them to starting negotiations on Gibraltar's future and lifting the Spanish restrictions on communications with Gibraltar. Although Britain promised to "honour the freely and democratically expressed wishes of the people of Gibraltar", Prime Minister Margaret Thatcher indicated in the House of Commons that sovereignty would be on the table, in a change from the previous policy. However, the border was not reopened due to "technical issues" – code for unresolved issues between the two governments – and the agreement was strongly opposed by many Gibraltarians, who did not wish their sovereignty to be under discussion and objected to the lack of Gibraltarian representatives at the talks. The outbreak of the Falklands War in 1982 caused a further delay. Argentina carried out an unsuccessful sabotage operation, kept secret at the time, that was intended to sink a Royal Navy frigate in Gibraltar's harbour; the saboteurs were captured by the Spanish police in Algeciras before they could carry out their attack. A further agreement was reached in Brussels in 1984 which clarified the Lisbon Agreement and required that Britain allow Spaniards to live and work in Gibraltar, which they would have the right to do anyway as EEC citizens. The border was finally fully reopened on 4–5 February 1985.
Solution:
In what city did a further agreement occur that clarified the statement of co-operation issues in 1980 between British and Spanish ministers?