Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.
What are two things that make up a UI backend?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Fish and Wildlife Service (FWS) and National Marine Fisheries Service (NMFS) are required to create an Endangered Species Recovery Plan outlining the goals, tasks required, likely costs, and estimated timeline to recover endangered species (i.e., increase their numbers and improve their management to the point where they can be removed from the endangered list). The ESA does not specify when a recovery plan must be completed. The FWS has a policy specifying completion within three years of the species being listed, but the average time to completion is approximately six years. The annual rate of recovery plan completion increased steadily from the Ford administration (4) through Carter (9), Reagan (30), Bush I (44), and Clinton (72), but declined under Bush II (16 per year as of 9/1/06).
What length of time does the NMFS policy say plans must be completed by?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Construction is currently underway on the Miami Intermodal Center and Miami Central Station, a massive transportation hub servicing Metrorail, Amtrak, Tri-Rail, Metrobus, Greyhound Lines, taxis, rental cars, MIA Mover, private automobiles, bicycles and pedestrians adjacent to Miami International Airport. Completion of the Miami Intermodal Center is expected to be completed by winter 2011, and will serve over 150,000 commuters and travelers in the Miami area. Phase I of Miami Central Station is scheduled to begin service in the spring of 2012, and Phase II in 2013.
What year was to see the incompletion of the Miami Intermodal Center?
A: unanswerable

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At low frequencies (such as AM broadcast), arrays of vertical towers are used to achieve directionality  and they will occupy large areas of land. For reception, a long Beverage antenna can have significant directivity. For non directional portable use, a short vertical antenna or small loop antenna works well, with the main design challenge being that of impedance matching. With a vertical antenna a loading coil at the base of the antenna may be employed to cancel the reactive component of impedance; small loop antennas are tuned with parallel capacitors for this purpose.
For radio broadcast that one would hear in their car what type of towers are used?
A:
vertical