Problem: Please answer a question about the following article about Mexico City:
By the 1990s Mexico City had become infamous as one of the world's most polluted cities; however the city has become a model for dramatically lowering pollution levels. By 2014 carbon monoxide pollution had dropped dramatically, while levels of sulfur dioxide and nitrogen dioxide were nearly three times lower than in 1992. The levels of signature pollutants in Mexico City are similar to those of Los Angeles.[citation needed] Despite the cleanup, the metropolitan area is still the most ozone-polluted part of the country, with ozone levels 2.5 times beyond WHO-defined safe limits.
When Mexico one of the worst cities in terms of pollution? 
A: 1990s
Problem: Please answer a question about the following article about Age of Enlightenment:
In addition to debates on religion, societies discussed issues such as politics and the role of women. It is important to note, however, that the critical subject matter of these debates did not necessarily translate into opposition to the government. In other words, the results of the debate quite frequently upheld the status quo. From a historical standpoint, one of the most important features of the debating society was their openness to the public; women attended and even participated in almost every debating society, which were likewise open to all classes providing they could pay the entrance fee. Once inside, spectators were able to participate in a largely egalitarian form of sociability that helped spread Enlightenment ideas.
What were some of the issues discussed in addition to debates on religion?
A: politics and the role of women
Problem: Please answer a question about the following article about Botany:
Unlike in higher animals, where parthenogenesis is rare, asexual reproduction may occur in plants by several different mechanisms. The formation of stem tubers in potato is one example. Particularly in arctic or alpine habitats, where opportunities for fertilisation of flowers by animals are rare, plantlets or bulbs, may develop instead of flowers, replacing sexual reproduction with asexual reproduction and giving rise to clonal populations genetically identical to the parent. This is one of several types of apomixis that occur in plants. Apomixis can also happen in a seed, producing a seed that contains an embryo genetically identical to the parent.
What do plants do when the environment makes fertilization especially difficult?
A: replacing sexual reproduction with asexual reproduction
Problem: Please answer a question about the following article about Federalism:
The Federalist Party of the United States was opposed by the Democratic-Republicans, including powerful figures such as Thomas Jefferson. The Democratic-Republicans mainly believed that: the Legislature had too much power (mainly because of the Necessary and Proper Clause) and that they were unchecked; the Executive had too much power, and that there was no check on the executive; a dictator would arise; and that a bill of rights should be coupled with the constitution to prevent a dictator (then believed to eventually be the president) from exploiting or tyrannizing citizens. The federalists, on the other hand, argued that it was impossible to list all the rights, and those that were not listed could be easily overlooked because they were not in the official bill of rights. Rather, rights in specific cases were to be decided by the judicial system of courts.
Who decided the rights in specific cases?
A:
the judicial system of courts