Given the task definition and input, reply with output. 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.

Passage: Gibraltar's relationship with Spain continued to be a sensitive subject. By 2002, Britain and Spain had proposed an agreement to share sovereignty over Gibraltar. However, it was opposed by the government of Gibraltar, which put it to a referendum in November 2002. The agreement was rejected by 17,000 votes to 187 – a majority of 98.97%. Although both governments dismissed the outcome as having no legal weight, the outcome of the referendum caused the talks to stall and the British government accepted that it would be unrealistic to try to reach an agreement without the support of the people of Gibraltar.The tercentenary of the capture of Gibraltar was celebrated in the territory in August 2004 but attracted criticism from some in Spain. In September 2006, tripartite talks between Spain, Gibraltar and the UK resulted in a deal (known as the Cordoba Agreement) to make it easier to cross the border and to improve transport and communications links between Spain and Gibraltar. Among the changes was an agreement to lift restrictions on Gibraltar's airport to enable airlines operating from Spain to land there and to facilitate use of the airport by Spanish residents. It did not address the vexed issue of sovereignty, but this time the government of Gibraltar supported it. A new Constitution Order was promulgated in the same year, which was approved by a majority of 60.24% in a referendum held in November 2006.
What areas agreed to the Cordoba Agreement?