Article: In addition, intermediaries are now also generally understood to include Internet portals, software and games providers, those providing virtual information such as interactive forums and comment facilities with or without a moderation system, aggregators of various kinds, such as news aggregators, universities, libraries and archives, web search engines, chat rooms, web blogs, mailing lists, and any website which provides access to third party content through, for example, hyperlinks, a crucial element of the World Wide Web.

Question: What examples provide virtual information?
Ans: interactive forums and comment facilities

Article: The political stability and development of hydrocarbon production made Republic of Congo the fourth largest oil producer in the Gulf of Guinea and provided the country with a relative prosperity despite the poor state of its infrastructure and public services and an unequal distribution of oil revenues.

Question: What income is subject to uneven distribution in the Congo?
Ans: oil revenues

Article: Historically, and since pre-Hispanic times, the Valley of Anahuac has been one of the most densely populated areas in Mexico. When the Federal District was created in 1824, the urban area of Mexico City extended approximately to the area of today's Cuauhtemoc borough. At the beginning of the 20th century, the elites began migrating to the south and west and soon the small towns of Mixcoac and San Angel were incorporated by the growing conurbation. According to the 1921 census, 54.78% of the city's population was considered Mestizo (Indigenous mixed with European), 22.79% considered European, and 18.74% considered Indigenous. This was the last Mexican Census which asked people to self-identify themselves with an heritage other than Amerindian. However, the census had the particularity that, unlike racial/ethnic census in other countries, it was focused in the perception of cultural heritage rather than in a racial perception, leading to a good number of white people to identify with "Mixed heritage" due cultural influence. In 1921, Mexico City had less than one million inhabitants.

Question: in 1921, what percent of Mexico City's population Mestizo?
Ans: 54.78

Article: The Wayback Machine is a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive, a nonprofit organization, based in San Francisco, California, United States. It was set up by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet. The service enables users to see archived versions of web pages across time, which the archive calls a "three dimensional index."

Question: What is the term used by Internet Archive to describe the Wayback Machine?
Ans:
three dimensional index