Given the following passage "The ability of birds to return to precise locations across vast distances has been known for some time; in an experiment conducted in the 1950s a Manx shearwater released in Boston returned to its colony in Skomer, Wales, within 13 days, a distance of 5,150 km (3,200 mi). Birds navigate during migration using a variety of methods. For diurnal migrants, the sun is used to navigate by day, and a stellar compass is used at night. Birds that use the sun compensate for the changing position of the sun during the day by the use of an internal clock. Orientation with the stellar compass depends on the position of the constellations surrounding Polaris. These are backed up in some species by their ability to sense the Earth's geomagnetism through specialised photoreceptors.", answer the following question. Note that the answer is present within the text. Question: What can some birds feel that others cannot?
Ans: the Earth's geomagnetism

Given the following passage "After its return in 2010, the AFL had its national television deal with the NFL Network for a weekly Friday night game. All AFL games not on the NFL Network could be seen for free online, provided by Ustream.", answer the following question. Note that the answer is present within the text. Question: What returned after 2009?
Ans: the AFL

Given the following passage "The highest pub in the United Kingdom is the Tan Hill Inn, Yorkshire, at 1,732 feet (528 m) above sea level. The remotest pub on the British mainland is The Old Forge in the village of Inverie, Lochaber, Scotland. There is no road access and it may only be reached by an 18-mile (29 km) walk over mountains, or a 7-mile (11 km) sea crossing. Likewise, The Berney Arms in Norfolk has no road access. It may be reached by foot or by boat, and by train as it is served by the nearby Berney Arms railway station, which likewise has no road access and serves no other settlement.", answer the following question. Note that the answer is present within the text. Question: which appendage can be used to reach the last bar mentioned?
Ans: foot

Given the following passage "Specific concerns include a compounded inability for the Air Force to replace its aging fleet, and an overall reduction of strength and readiness. The USAF attempted to make these adjustments by primarily cutting the Air National Guard and Air Force Reserve aircraft fleets and their associated manpower, but Congress reversed this initiative and the majority of the lost manpower will come from the active forces. However, Congress did allow for $208 million of reprogramming from fleet modernization to enable some portion of the third of the grounded fleet to resume operations.", answer the following question. Note that the answer is present within the text. Question: How will USAF replace its aging fleet?
Ans: fleet modernization