Input: Read this: In Europe, the copyright infringement case Public Relations Consultants Association Ltd v Newspaper Licensing Agency Ltd had two prongs; one concerned whether a news aggregator service infringed the copyright of the news generators; the other concerned whether the temporary web cache created by the web browser of a consumer of the aggregator's service, also infringed the copyright of the news generators. The first prong was decided in favor of the news generators; in June 2014 the second prong was decided by the Court of Justice of the European Union (CJEU), which ruled that the temporary web cache of consumers of the aggregator did not infringe the copyright of the news generators.
Question: What did the courts rule was NOT infringement?

Output: temporary web cache of consumers


Input: Read this: Some agriculturalists also regularly hunt and gather (e.g., farming during the frost-free season and hunting during the winter). Still others in developed countries go hunting, primarily for leisure. In the Brazilian rainforest, those groups that recently did, or even continue to, rely on hunting and gathering techniques seem to have adopted this lifestyle, abandoning most agriculture, as a way to escape colonial control and as a result of the introduction of European diseases reducing their populations to levels where agriculture became difficult.[citation needed][dubious – discuss]
Question: Others in undeveloped countries go hunting, primarily for what?

Output: unanswerable


Input: Read this: Objections to banning the use of incandescent light bulbs include the higher initial cost of alternatives and lower quality of light of fluorescent lamps. Some people have concerns about the health effects of fluorescent lamps. However, even though they contain mercury, the environmental performance of CFLs is much better than that of light bulbs, mostly because they consume much less energy and therefore strongly reduce the environmental impact of power production. LED lamps are even more efficient, and are free of mercury. They are regarded as the best solution in terms of cost effectiveness and robustness.
Question: What type of light consumes much more energy and therefore strongly reduce the environmental impact of power production?

Output: unanswerable


Input: Read this: The upgrade addressed a number of criticisms faced by Windows 8 upon its release, with additional customization options for the Start screen, the restoration of a visible Start button on the desktop, the ability to snap up to four apps on a single display, and the ability to boot to the desktop instead of the Start screen. Windows 8's stock apps were also updated, a new Bing-based unified search system was added, SkyDrive was given deeper integration with the operating system, and a number of new stock apps, along with a tutorial, were added. Windows 8.1 also added support for 3D printing, Miracast media streaming, NFC printing, and Wi-Fi Direct.
Question: What search engine was added in Windows 9.1?

Output:
unanswerable