Input: Read this: The concentration of copper in ores averages only 0.6%, and most commercial ores are sulfides, especially chalcopyrite (CuFeS2) and to a lesser extent chalcocite (Cu2S). These minerals are concentrated from crushed ores to the level of 10–15% copper by froth flotation or bioleaching. Heating this material with silica in flash smelting removes much of the iron as slag. The process exploits the greater ease of converting iron sulfides into its oxides, which in turn react with the silica to form the silicate slag, which floats on top of the heated mass. The resulting copper matte consisting of Cu2S is then roasted to convert all sulfides into oxides:
Question: What does heating copper ore materials with silica remove?

Output: iron


QUES: The city had a population of 1,307,402 according to the 2010 census, distributed over a land area of 372.1 square miles (963.7 km2). The urban area of San Diego extends beyond the administrative city limits and had a total population of 2,956,746, making it the third-largest urban area in the state, after that of the Los Angeles metropolitan area and San Francisco metropolitan area. They, along with the Riverside–San Bernardino, form those metropolitan areas in California larger than the San Diego metropolitan area, with a total population of 3,095,313 at the 2010 census.

How many square miles does San Francisco cover?
What is the answer?
ANS: unanswerable


QUES: Another non-obligate symbiosis is known from encrusting bryozoans and hermit crabs that live in a close relationship. The bryozoan colony (Acanthodesia commensale) develops a cirumrotatory growth and offers the crab (Pseudopagurus granulimanus) a helicospiral-tubular extension of its living chamber that initially was situated within a gastropod shell.
What species of crab develops a cirumrotatory growth?

ANS: unanswerable


The practice of labelling the infringement of exclusive rights in creative works as "piracy" predates statutory copyright law. Prior to the Statute of Anne in 1710, the Stationers' Company of London in 1557, received a Royal Charter giving the company a monopoly on publication and tasking it with enforcing the charter. Those who violated the charter were labelled pirates as early as 1603. The term "piracy" has been used to refer to the unauthorized copying, distribution and selling of works in copyright. Article 12 of the 1886 Berne Convention for the Protection of Literary and Artistic Works uses the term "piracy" in relation to copyright infringement, stating "Pirated works may be seized on importation into those countries of the Union where the original work enjoys legal protection." Article 61 of the 1994 Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPs) requires criminal procedures and penalties in cases of "willful trademark counterfeiting or copyright piracy on a commercial scale." Piracy traditionally refers to acts of copyright infringement intentionally committed for financial gain, though more recently, copyright holders have described online copyright infringement, particularly in relation to peer-to-peer file sharing networks, as "piracy."
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What did the Royal Charter not give to the Stationers' Company of London?
Ah, so.. unanswerable


Question: Definitions of literature have varied over time; it is a "culturally relative definition". In Western Europe prior to the eighteenth century, literature as a term indicated all books and writing. A more restricted sense of the term emerged during the Romantic period, in which it began to demarcate "imaginative" literature. Contemporary debates over what constitutes literature can be seen as returning to the older, more inclusive notion of what constitutes literature. Cultural studies, for instance, takes as its subject of analysis both popular and minority genres, in addition to canonical works.
Try to answer this question if possible: In Eastern Europe, literature included all books and what else?
Answer: unanswerable


Problem: The Cork accent, part of the Southwest dialect of Hiberno-English, displays various features which set it apart from other accents in Ireland. Patterns of tone and intonation often rise and fall, with the overall tone tending to be more high-pitched than other Irish accents. English spoken in Cork has a number of dialect words that are peculiar to the city and environs. Like standard Hiberno-English, some of these words originate from the Irish language, but others through other languages Cork's inhabitants encountered at home and abroad. The Cork accent displays varying degrees of rhoticity, usually depending on the social-class of the speaker.
What type of English does the Cork dialect borrow words from?
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Answer:
unanswerable