Question: Since regaining independence, Estonia has pursued a foreign policy of close co-operation with its Western European partners. The two most important policy objectives in this regard have been accession into NATO and the European Union, achieved in March and May 2004 respectively. Estonia's international realignment toward the West has been accompanied by a general deterioration in relations with Russia, most recently demonstrated by the protest triggered by the controversial relocation of the Bronze Soldier World War II memorial in Tallinn.
Is there an answer to this question: What type of foreign policy has Estonia sought after getting their independence?

Answer: close co-operation

Question: General Electric heavily contaminated the Hudson River with polychlorinated biphenyls (PCBs) between 1947-77. This pollution caused a range of harmful effects to wildlife and people who eat fish from the river or drink the water. In response to this contamination, activists protested in various ways. Musician Pete Seeger founded the Hudson River Sloop Clearwater and the Clearwater Festival to draw attention to the problem. The activism led to the site being designated by the EPA as one of the superfund sites requiring extensive cleanup. Other sources of pollution, including mercury contamination and sewage dumping, have also contributed to problems in the Hudson River watershed.
Is there an answer to this question: In what year did sewage dumping in the Hudson River become a problem?

Answer: unanswerable

Question: From 1920, Eisenhower served under a succession of talented generals Fox Conner, John J. Pershing, Douglas MacArthur and George Marshall. He first became executive officer to General Conner in the Panama Canal Zone, where, joined by Mamie, he served until 1924. Under Conner's tutelage, he studied military history and theory (including Carl von Clausewitz's On War), and later cited Conner's enormous influence on his military thinking, saying in 1962 that "Fox Conner was the ablest man I ever knew." Conner's comment on Eisenhower was, "[He] is one of the most capable, efficient and loyal officers I have ever met." On Conner's recommendation, in 192526 he attended the Command and General Staff College at Fort Leavenworth, Kansas, where he graduated first in a class of 245 officers. He then served as a battalion commander at Fort Benning, Georgia, until 1927.
Is there an answer to this question: What notable military treatise was authored by von Clausewitz?

Answer: On War

Question: Antarctica continued to become more isolated and finally developed a permanent ice cap. Mountain building in western North America continued, and the Alps started to rise in Europe as the African plate continued to push north into the Eurasian plate, isolating the remnants of Tethys Sea. A brief marine incursion marks the early Oligocene in Europe. There appears to have been a land bridge in the early Oligocene between North America and Europe since the faunas of the two regions are very similar. During the Oligocene, South America was finally detached from Antarctica and drifted north toward North America. It also allowed the Antarctic Circumpolar Current to flow, rapidly cooling the continent.
Is there an answer to this question: In the Oligocene period South America broke free from what other continent?

Answer:
Antarctica