The problem: Answer a question about this article:
Paul VI opened the third period on 14 September 1964, telling the Council Fathers that he viewed the text about the Church as the most important document to come out from the Council. As the Council discussed the role of bishops in the papacy, Paul VI issued an explanatory note confirming the primacy of the papacy, a step which was viewed by some as meddling in the affairs of the Council American bishops pushed for a speedy resolution on religious freedom, but Paul VI insisted this to be approved together with related texts such as ecumenism. The Pope concluded the session on 21 November 1964, with the formal pronouncement of Mary as Mother of the Church.
In what year did Paul VI formally appoint Mary as mother of the Catholic church?
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The answer: 1964

The problem: Answer a question about this article:
In March 1875, Bell and Pollok visited the famous scientist Joseph Henry, who was then director of the Smithsonian Institution, and asked Henry's advice on the electrical multi-reed apparatus that Bell hoped would transmit the human voice by telegraph. Henry replied that Bell had "the germ of a great invention". When Bell said that he did not have the necessary knowledge, Henry replied, "Get it!" That declaration greatly encouraged Bell to keep trying, even though he did not have the equipment needed to continue his experiments, nor the ability to create a working model of his ideas. However, a chance meeting in 1874 between Bell and Thomas A. Watson, an experienced electrical designer and mechanic at the electrical machine shop of Charles Williams, changed all that.
Who did Bell go to see in 1875?
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The answer: Joseph Henry

The problem: Answer a question about this article:
The current economy of the city is basically newly developed based on the past. Service industries are dominating, accounting for about 60 percent of the GDP of the city, and financial industry, culture industry and tourism industry are top 3 of them. Industries of information technology, energy saving and environmental protection, new energy, smart power grid and intelligent equipment manufacturing have become pillar industries. Big private firms include Suning, Yurun, Sanpower, Fuzhong, Hiteker, 5stars, Jinpu, Tiandi, CTTQ Pharmaceutical and Simcere Pharmaceutical. Big state-owned firms include Panda Electronics, Yangzi Petrochemical, Jinling Petrochemical, Nanjing Chemical, Nanjing Steel, Jincheng Motors, Jinling Pharmaceutical, Chenguang and NARI. The city has also attracted foreign investment, multinational firms such as Siemens, Ericsson, Volkswagen, Iveco, A.O. Smith, and Sharp have established their lines, and a number of multinationals such as Ford, IBM, Lucent, Samsung and SAP established research center there. Many China-based leading firms such as Huawei, ZTE and Lenovo have key R & D institutes in the city. Nanjing is an industrial technology research and development hub, hosting many R & D centers and institutions, especially in areas of electronics technology, information technology, computer software, biotechnology and pharmaceutical technology and new material technology.
What type of industries are now dominant in Nanjing?
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The answer: Service industries

The problem: Answer a question about this article:
No definite relation exists between the annual rings of growth and the amount of sapwood. Within the same species the cross-sectional area of the sapwood is very roughly proportional to the size of the crown of the tree. If the rings are narrow, more of them are required than where they are wide. As the tree gets larger, the sapwood must necessarily become thinner or increase materially in volume. Sapwood is thicker in the upper portion of the trunk of a tree than near the base, because the age and the diameter of the upper sections are less.
In what part of the tree trunk is the sapwood layer thinnest?
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The answer:
near the base