Question:  Argentina: The torch relay leg in Buenos Aires, Argentina, held on April 11, began with an artistic show at the Lola Mora amphitheatre in Costanera Sur. In the end of the show the mayor of Buenos Aires Mauricio Macri gave the torch to the first torchbearer, Carlos Espínola. The leg finished at the Buenos Aires Riding Club in the Palermo district, the last torchbearer being Gabriela Sabatini. The 13.8 km route included landmarks like the obelisk and Plaza de Mayo. The day was marked by several pro-Tibet protests, which included a giant banner reading "Free Tibet", and an alternative "human rights torch" that was lit by protesters and paraded along the route the flame was to take. Most of these protests were peaceful in nature, and the torch was not impeded. Chinese immigrants also turned out in support of the Games, but only minor scuffles were reported between both groups. Runners surrounded by rows of security carried the Olympic flame past thousands of jubilant Argentines in the most trouble-free torch relay in nearly a week. People showered the parade route with confetti as banks, government offices and businesses took an impromptu half-day holiday for the only Latin American stop on the flame's five-continent journey.
Is there an answer to this question: Who was the mayor of Buenos Aires?

Answer: Mauricio Macri


Question: In The Open Society and Its Enemies and The Poverty of Historicism, Popper developed a critique of historicism and a defence of the "Open Society". Popper considered historicism to be the theory that history develops inexorably and necessarily according to knowable general laws towards a determinate end. He argued that this view is the principal theoretical presupposition underpinning most forms of authoritarianism and totalitarianism. He argued that historicism is founded upon mistaken assumptions regarding the nature of scientific law and prediction. Since the growth of human knowledge is a causal factor in the evolution of human history, and since "no society can predict, scientifically, its own future states of knowledge", it follows, he argued, that there can be no predictive science of human history. For Popper, metaphysical and historical indeterminism go hand in hand.
Is there an answer to this question: What can predict its own future states of knowledge? 

Answer: unanswerable


Question: Migrating birds can lose their way and appear outside their normal ranges. This can be due to flying past their destinations as in the "spring overshoot" in which birds returning to their breeding areas overshoot and end up further north than intended. Certain areas, because of their location, have become famous as watchpoints for such birds. Examples are the Point Pelee National Park in Canada, and Spurn in England.
Is there an answer to this question: What other location is famous for spring overshoot?

Answer: Spurn in England


Question: In 1987, occupations and units with the primary role of preparing for direct involvement in combat on the ground or at sea were still closed to women: infantry, armoured corps, field artillery, air-defence artillery, signals, field engineers, and naval operations. On 5 February 1987, the Minister of National Defence created an office to study the impact of employing men and women in combat units. These trials were called Combat-Related Employment of Women.
Is there an answer to this question: On what date was a study created to research the impart on men in direct involvement?

Answer:
unanswerable