Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The majority of studies indicate antibiotics do interfere with contraceptive pills, such as clinical studies that suggest the failure rate of contraceptive pills caused by antibiotics is very low (about 1%). In cases where antibacterials have been suggested to affect the efficiency of birth control pills, such as for the broad-spectrum antibacterial rifampicin, these cases may be due to an increase in the activities of hepatic liver enzymes' causing increased breakdown of the pill's active ingredients. Effects on the intestinal flora, which might result in reduced absorption of estrogens in the colon, have also been suggested, but such suggestions have been inconclusive and controversial. Clinicians have recommended that extra contraceptive measures be applied during therapies using antibacterials that are suspected to interact with oral contraceptives.
What do control pills recommend to counteract this potential issue?
A: unanswerable

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Bush and Kerry met for the third and final debate at Arizona State University on October 13. 51 million viewers watched the debate which was moderated by Bob Schieffer of CBS News. However, at the time of the ASU debate, there were 15.2 million viewers tuned in to watch the Major League Baseball playoffs broadcast simultaneously. After Kerry, responding to a question about gay rights, reminded the audience that Vice President Cheney's daughter was a lesbian, Cheney responded with a statement calling himself "a pretty angry father" due to Kerry using Cheney's daughter's sexual orientation for his political purposes.
What college did Cheney's daughter graduate from?
A: unanswerable

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World Trade Center Montevideo officially opened in 1998, although work is still ongoing as of 2010[update]. The complex is composed of three towers, two three-story buildings called World Trade Center Plaza and World Trade Center Avenue and a large central square called Towers Square. World Trade Center 1 was the first building to be inaugurated, in 1998.[citation needed] It has 22 floors and 17,100 square metres of space. That same year the avenue and the auditorium were raised. World Trade Center 2 was inaugurated in 2002, a twin tower of World Trade Center 1. Finally, in 2009, World Trade Center 3 and the World Trade Center Plaza and the Towers Square were inaugurated. It is located between the avenues Luis Alberto de Herrera and 26 de Marzo and has 19 floors and 27,000 square metres (290,000 sq ft) of space. The 6,300-square-metre (68,000 sq ft)[citation needed] World Trade Center Plaza is designed to be a centre of gastronomy opposite Towers Square and Bonavita St. Among the establishments on the plaza are Burger King, Walrus, Bamboo, Asia de Cuba, Gardenia Mvd, and La Claraboya Cafe.
When was World Trade Center 2 inaugurated?
A: 2002

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Wood unsuitable for construction in its native form may be broken down mechanically (into fibers or chips) or chemically (into cellulose) and used as a raw material for other building materials, such as engineered wood, as well as chipboard, hardboard, and medium-density fiberboard (MDF). Such wood derivatives are widely used: wood fibers are an important component of most paper, and cellulose is used as a component of some synthetic materials. Wood derivatives can also be used for kinds of flooring, for example laminate flooring.
How is wood broken down into chips and fibers?
A:
mechanically