Input: Article: Tonearm skating forces and other perturbations are also picked up by the stylus. This is a form of frequency multiplexing as the control signal (restoring force) used to keep the stylus in the groove is carried by the same mechanism as the sound itself. Subsonic frequencies below about 20 Hz in the audio signal are dominated by tracking effects, which is one form of unwanted rumble ("tracking noise") and merges with audible frequencies in the deep bass range up to about 100 Hz. High fidelity sound equipment can reproduce tracking noise and rumble. During a quiet passage, woofer speaker cones can sometimes be seen to vibrate with the subsonic tracking of the stylus, at frequencies as low as just above 0.5 Hz (the frequency at which a 33 13 rpm record turns on the turntable; 59 Hz exactly on an ideal turntable). Another reason for very low frequency material can be a warped disk: its undulations produce frequencies of only a few hertz and present day amplifiers have large power bandwidths. For this reason, many stereo receivers contained a switchable subsonic filter. Some subsonic content is directly out of phase in each channel. If played back on a mono subwoofer system, the noise will cancel, significantly reducing the amount of rumble that is reproduced.

Now answer this question: Which frequencies are you most likely to hear tonearm skating?

Output: frequencies below about 20 Hz

Input: Article: As reflected in the 2010 United States Census, Alaska has a total of 355 incorporated cities and census-designated places (CDPs). The tally of cities includes four unified municipalities, essentially the equivalent of a consolidated citycounty. The majority of these communities are located in the rural expanse of Alaska known as "The Bush" and are unconnected to the contiguous North American road network. The table at the bottom of this section lists the 100 largest cities and census-designated places in Alaska, in population order.

Now answer this question: What are CDPs?

Output: census-designated places

Input: Article: In 1863, the newly founded Football Association (the FA) published the Laws of the Game of Association Football, unifying the various different rules in use before then. On 20 July 1871, in the offices of The Sportsman newspaper, the FA Secretary C. W. Alcock proposed to the FA committee that "it is desirable that a Challenge Cup should be established in connection with the Association for which all clubs belonging to the Association should be invited to compete". The inaugural FA Cup tournament kicked off in November 1871. After thirteen games in all, Wanderers were crowned the winners in the final, on 16 March 1872. Wanderers retained the trophy the following year. The modern cup was beginning to be established by the 188889 season, when qualifying rounds were introduced.

Now answer this question: When did the inaugural FA cup tournament take place?

Output:
November 1871