input: Please answer the following: Extract the answer to the question from the following context. Question: What made the new user interfact more confusing and difficult to learn? Context: Windows 8 was released to a mixed critical reception. Although reaction towards its performance improvements, security enhancements, and improved support for touchscreen devices was positive, the new user interface of the operating system was widely criticized for being potentially confusing and difficult to learn (especially when used with a keyboard and mouse instead of a touchscreen). Despite these shortcomings, 60 million Windows 8 licenses have been sold through January 2013, a number which included both upgrades and sales to OEMs for new PCs.
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output: when used with a keyboard and mouse

input: Please answer the following: Extract the answer to the question from the following context. Question: What must congress make no law regarding the establishment of? Context: Some legal scholars, such as John Baker of LSU, theorize that Madison's initial proposed languagethat Congress should make no law regarding the establishment of a "national religion"was rejected by the House, in favor of the more general "religion" in an effort to appease the Anti-Federalists. To both the Anti-Federalists and the Federalists, the very word "national" was a cause for alarm because of the experience under the British crown. During the debate over the establishment clause, Rep. Elbridge Gerry of Massachusetts took issue with Madison's language regarding whether the government was a national or federal government (in which the states retained their individual sovereignty), which Baker suggests compelled Madison to withdraw his language from the debate.
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output: religion

input: Please answer the following: Extract the answer to the question from the following context. Question: Who contributed to both the SPE and to its origins? Context: In 1968 Noam Chomsky and Morris Halle published The Sound Pattern of English (SPE), the basis for generative phonology. In this view, phonological representations are sequences of segments made up of distinctive features. These features were an expansion of earlier work by Roman Jakobson, Gunnar Fant, and Morris Halle. The features describe aspects of articulation and perception, are from a universally fixed set, and have the binary values + or . There are at least two levels of representation: underlying representation and surface phonetic representation. Ordered phonological rules govern how underlying representation is transformed into the actual pronunciation (the so-called surface form). An important consequence of the influence SPE had on phonological theory was the downplaying of the syllable and the emphasis on segments. Furthermore, the generativists folded morphophonology into phonology, which both solved and created problems.
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output: Halle

input: Please answer the following: Extract the answer to the question from the following context. Question: What pervasive material makes experimental QED vacuums impossible? Context: In quantum mechanics and quantum field theory, the vacuum is defined as the state (that is, the solution to the equations of the theory) with the lowest possible energy (the ground state of the Hilbert space). In quantum electrodynamics this vacuum is referred to as 'QED vacuum' to distinguish it from the vacuum of quantum chromodynamics, denoted as QCD vacuum. QED vacuum is a state with no matter particles (hence the name), and also no photons. As described above, this state is impossible to achieve experimentally. (Even if every matter particle could somehow be removed from a volume, it would be impossible to eliminate all the blackbody photons.) Nonetheless, it provides a good model for realizable vacuum, and agrees with a number of experimental observations as described next.
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output:
blackbody photons