This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

[EX Q]: Passage: In January 1956, the new Constitution of Egypt was drafted, entailing the establishment of a single-party system under the National Union (NU), a movement Nasser described as the "cadre through which we will realize our revolution". The NU was a reconfiguration of the Liberation Rally, which Nasser determined had failed in generating mass public participation. In the new movement, Nasser attempted to incorporate more citizens, approved by local-level party committees, in order to solidify popular backing for his government. The NU would select a nominee for the presidential election whose name would be provided for public approval. Question: What was the dominant political party? 
[EX A]: National Union

[EX Q]: Passage: The economic output of the metropolitan area alone is worth more than one third of national GDP around $6.5billion in terms of nominal GDP NR.s 550 billion approximately per year $2200 per capital income approx three times national average. Kathmandu exports handicrafts, artworks, garments, carpets, pashmina, paper; trade accounts for 21% of its finances.[which?] Manufacturing is also important and accounts for 19% of the revenue that Kathmandu generates. Garments and woolen carpets are the most notable manufactured products. Other economic sectors in Kathmandu include agriculture (9%), education (6%), transport (6%), and hotels and restaurants (5%). Kathmandu is famous for lokta paper and pashmina shawls. Question: What is the GDP of Kathmandu?
[EX A]: 6.5billion

[EX Q]: Passage: Archaeology confirms the widespread use of binding spells (defixiones), magical papyri and so-called "voodoo dolls" from a very early era. Around 250 defixiones have been recovered just from Roman Britain, in both urban and rural settings. Some seek straightforward, usually gruesome revenge, often for a lover's offense or rejection. Others appeal for divine redress of wrongs, in terms familiar to any Roman magistrate, and promise a portion of the value (usually small) of lost or stolen property in return for its restoration. None of these defixiones seem produced by, or on behalf of the elite, who had more immediate recourse to human law and justice. Similar traditions existed throughout the empire, persisting until around the 7th century AD, well into the Christian era. Question: Until what era did spells persist in the empire?
[EX A]:
7th century AD