Problem: Catalan language:

As in the other Western Romance languages, the main plural expression is the suffix -s, which may create morphological alternations similar to the ones found in gender inflection, albeit more rarely. The most important one is the addition of -o- before certain consonant groups, a phonetic phenomenon that does not affect feminine forms: el pols/els polsos ("the pulse"/"the pulses") vs. la pols/les pols ("the dust"/"the dusts").

What is an important plural alternation?
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A: addition of -o-

Problem: Whitehead's most complete work on education is the 1929 book The Aims of Education and Other Essays, which collected numerous essays and addresses by Whitehead on the subject published between 1912 and 1927. The essay from which Aims of Education derived its name was delivered as an address in 1916 when Whitehead was president of the London Branch of the Mathematical Association. In it, he cautioned against the teaching of what he called "inert ideas" ideas that are disconnected scraps of information, with no application to real life or culture. He opined that "education with inert ideas is not only useless: it is, above all things, harmful."
During what periods of time were the essays and address contained in "The Aims of Education and Other Essays" composed?
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Answer: between 1912 and 1927

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
A number of parties have collected survey data, from the public and from experts, to try and gauge the level of corruption and bribery, as well as its impact on political and economic outcomes. A second wave of corruption metrics has been created by Global Integrity, the International Budget Partnership, and many lesser known local groups. These metrics include the Global Integrity Index, first published in 2004. These second wave projects aim to create policy change by identifying resources more effectively and creating checklists toward incremental reform. Global Integrity and the International Budget Partnership each dispense with public surveys and instead uses in-country experts to evaluate "the opposite of corruption" which Global Integrity defines as the public policies that prevent, discourage, or expose corruption. These approaches compliment the first wave, awareness-raising tools by giving governments facing public outcry a checklist which measures concrete steps toward improved governance.
Both companies no longer use what means of collecting of data?
A: public surveys

Context and question: The Somerset Levels (or Somerset Levels and Moors as they are less commonly but more correctly known) are a sparsely populated wetland area of central Somerset, between the Quantock and Mendip hills. They consist of marine clay levels along the coast, and the inland (often peat based) moors. The Levels are divided into two by the Polden Hills; land to the south is drained by the River Parrett while land to the north is drained by the River Axe and the River Brue. The total area of the Levels amounts to about 647.5 square kilometres (160,000 acres) and broadly corresponds to the administrative district of Sedgemoor but also includes the south west of Mendip district. Approximately 70% of the area is grassland and 30% is arable. Stretching about 32 kilometres (20 mi) inland, this expanse of flat land barely rises above sea level. Before it was drained, much of the land was under a shallow brackish sea in winter and was marsh land in summer. Drainage began with the Romans, and was restarted at various times: by the Anglo-Saxons; in the Middle Ages by the Glastonbury Abbey, from 14001770; and during the Second World War, with the construction of the Huntspill River. Pumping and management of water levels still continues.
what do the Somerset levels consist of
Answer: marine clay levels along the coast, and the inland (often peat based) moors

Question: There are traditions long associated with football games. Students growl like wildcats when the opposing team controls the ball, while simulating a paw with their hands. They will also jingle keys at the beginning of each kickoff. In the past, before the tradition was discontinued, students would throw marshmallows during games. The Clock Tower at the Rebecca Crown Center glows purple, instead of its usual white, after a winning game, thereby proclaiming the happy news. The Clock Tower remains purple until a loss or until the end of the sports season. Whereas formerly the Clock Tower was lighted only for football victories, wins for men's basketball and women's lacrosse now merit commemoration as well; important victories in other sports may also prompt an empurpling.
Is there an answer to this question: What soccer game tradition has since been discontinued?

Answer: unanswerable

Question: Following the 191415 edition, the competition was suspended due to the First World War, and didn't resume until 191920. The 192223 competition saw the first final to be played in the newly opened Wembley Stadium (known at the time as the Empire Stadium). Due to the outbreak of World War II, the competition wasn't played between the 193839 and 194546 editions. Due to the wartime breaks, the competition didn't celebrate its centenary year until 198081; fittingly the final featured a goal by Ricky Villa which was later voted the greatest goal ever scored at Wembley Stadium, but has since been replaced by Steven Gerrard.
Is there an answer to this question: When did Wembly stadium open?

Answer:
192223