Input: Read this: In the 1840s Nicholas I reduced 64,000 szlachta to commoner status. Despite this, 62.8% of Russia's nobles were szlachta in 1858 and still 46.1% in 1897. Serfdom was abolished in Russian Poland on February 19, 1864. It was deliberately enacted in a way that would ruin the szlachta. It was the only area where peasants paid the market price in redemption for the land (the average for the empire was 34% above the market price). All land taken from Polish peasants since 1846 was to be returned without redemption payments. The ex serfs could only sell land to other peasants, not szlachta. 90% of the ex serfs in the empire who actually gained land after 1861 were in the 8 western provinces. Along with Romania, Polish landless or domestic serfs were the only ones to be given land after serfdom was abolished. All this was to punish the szlachta's role in the uprisings of 1830 and 1863. By 1864 80% of szlachta were declasse, 1/4 petty nobles were worse off than the average serf, 48.9% of land in Russian Poland was in peasant hands, nobles still held 46%. In Second Polish Republic the privileges of the nobility were lawfully abolished by the March Constitution in 1921 and as such not granted by any future Polish law.
Question: When and who abolished the serfdom?

Output: Russian Poland on February 19, 1864

Input: Read this: Praca dos Tres Poderes (Portuguese for Square of the Three Powers) is a plaza in Brasilia. The name is derived from the encounter of the three federal branches around the plaza: the Executive, represented by the Palacio do Planalto (presidential office); the Legislative, represented by the National Congress (Congresso Nacional); and the Judicial branch, represented by the Supreme Federal Court (Supremo Tribunal Federal). It is a tourist attraction in Brasilia, designed by Lucio Costa and Oscar Niemeyer as a place where the three branches would meet harmoniously.
Question: Where does the name Lucio Costa come from?

Output: unanswerable

Input: Read this: Not all traditions of Buddhism share the same philosophical outlook, or treat the same concepts as central. Each tradition, however, does have its own core concepts, and some comparisons can be drawn between them. For example, according to one Buddhist ecumenical organization,[web 23] several concepts common to both major Buddhist branches:
Question: Each tradition has its own core what?

Output: concepts

Input: Read this: The phrase is usually used in local political debates, in polemic writing or in private conversations. It is rarely used by politicians themselves in a public context, although at certain times in Canadian history political parties have used other similarly loaded imagery. In the 1988 federal election, the Liberals asserted that the proposed Free Trade Agreement amounted to an American takeover of Canadanotably, the party ran an ad in which Progressive Conservative (PC) strategists, upon the adoption of the agreement, slowly erased the Canada-U.S. border from a desktop map of North America. Within days, however, the PCs responded with an ad which featured the border being drawn back on with a permanent marker, as an announcer intoned "Here's where we draw the line."
Question: Who erased the border in the ad?

Output:
Progressive Conservative (PC) strategists