Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Wide-ringed wood is often called "second-growth", because the growth of the young timber in open stands after the old trees have been removed is more rapid than in trees in a closed forest, and in the manufacture of articles where strength is an important consideration such "second-growth" hardwood material is preferred. This is particularly the case in the choice of hickory for handles and spokes. Here not only strength, but toughness and resilience are important. The results of a series of tests on hickory by the U.S. Forest Service show that:
What specific kind of "second-growth" hardwood is often used to make handles and spokes?
A: hickory

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In the United States, August Vollmer introduced other reforms, including education requirements for police officers. O.W. Wilson, a student of Vollmer, helped reduce corruption and introduce professionalism in Wichita, Kansas, and later in the Chicago Police Department. Strategies employed by O.W. Wilson included rotating officers from community to community to reduce their vulnerability to corruption, establishing of a non-partisan police board to help govern the police force, a strict merit system for promotions within the department, and an aggressive recruiting drive with higher police salaries to attract professionally qualified officers. During the professionalism era of policing, law enforcement agencies concentrated on dealing with felonies and other serious crime, rather than broader focus on crime prevention.
Who was W.O. Wilson a student of?
A: unanswerable

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Proponents of affirmative action argue that by nature the system is not only race based, but also class and gender based. To eliminate two of its key components would undermine the purpose of the entire system. The African American Policy Forum believes that the class based argument is based on the idea that non-poor minorities do not experience racial and gender based discrimination. The AAPF believes that "Race-conscious affirmative action remains necessary to address race-based obstacles that block the path to success of countless people of color of all classes". The groups goes on to say that affirmative action is responsible for creating the African American middle class, so it does not make sense to say that the system only benefits the middle and upper classes.
What does the AAPF believe the goal of non-affirmative action should be?
A: unanswerable

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Richard Nixon used national security as a basis for his expansion of power. He asserted, for example, that "the inherent power of the President to safeguard the security of the nation" authorized him to order a wiretap without a judge's warrant. Nixon also asserted that "executive privilege" shielded him from all legislative oversight; furthermore, he impounded federal funds (that is to say, he refused to spend money that Congress had appropriated for government programs). In the specific cases aforementioned, however, the Supreme Court ruled against Nixon. This was also because of an ongoing criminal investigation into the Watergate tapes, even though they acknowledged the general need for executive privilege. Since then, Nixon's successors have sometimes asserted that they may act in the interests of national security or that executive privilege shields them from Congressional oversight. Though such claims have in general been more limited than Nixon's, one may still conclude that the presidency's power has been greatly augmented since the eighteenth and nineteenth centuries.
Into which tapes was there an ongoing civil investigation?
A:
unanswerable