Input: Read this: The differential analyser, a mechanical analog computer designed to solve differential equations by integration, used wheel-and-disc mechanisms to perform the integration. In 1876 Lord Kelvin had already discussed the possible construction of such calculators, but he had been stymied by the limited output torque of the ball-and-disk integrators. In a differential analyzer, the output of one integrator drove the input of the next integrator, or a graphing output. The torque amplifier was the advance that allowed these machines to work. Starting in the 1920s, Vannevar Bush and others developed mechanical differential analyzers.
Question: In 1876 who lobbied for the construction of the differential analyzers?

Output: Lord Kelvin


Input: Read this: This changed with the recent sovereign-debt crisis. The ECB always could, and through the late summer of 2011 did, purchase bonds issued by the weaker states even though it assumes, in doing so, the risk of a deteriorating balance sheet. ECB buying focused primarily on Spanish and Italian debt. Certain techniques can minimise the impact. Purchases of Italian bonds by the central bank, for example, were intended to dampen international speculation and strengthen portfolios in the private sector and also the central bank.
Question: What was something used to maximize the impact of the soverign-debt crisis?

Output: unanswerable


Input: Read this: The Houston area has over 150 active faults (estimated to be 300 active faults) with an aggregate length of up to 310 miles (500 km), including the Long Point–Eureka Heights fault system which runs through the center of the city. There have been no significant historically recorded earthquakes in Houston, but researchers do not discount the possibility of such quakes having occurred in the deeper past, nor occurring in the future. Land in some areas southeast of Houston is sinking because water has been pumped out of the ground for many years. It may be associated with slip along the faults; however, the slippage is slow and not considered an earthquake, where stationary faults must slip suddenly enough to create seismic waves. These faults also tend to move at a smooth rate in what is termed "fault creep", which further reduces the risk of an earthquake.
Question: What geological feature has been removed underground to cause sinking in areas of southeast Houston?

Output: water


Input: Read this: A series of low-lying annexes (largely hidden) flank both ends. Also in the square are the glass-faced Planalto Palace housing the presidential offices, and the Palace of the Supreme Court. Farther east, on a triangle of land jutting into the lake, is the Palace of the Dawn (Palácio da Alvorada; the presidential residence). Between the federal and civic buildings on the Monumental Axis is the city's cathedral, considered by many to be Niemeyer's finest achievement (see photographs of the interior). The parabolically shaped structure is characterized by its 16 gracefully curving supports, which join in a circle 115 feet (35 meters) above the floor of the nave; stretched between the supports are translucent walls of tinted glass. The nave is entered via a subterranean passage rather than conventional doorways. Other notable buildings are Buriti Palace, Itamaraty Palace, the National Theater, and several foreign embassies that creatively embody features of their national architecture. The Brazilian landscape architect Roberto Burle Marx designed landmark modernist gardens for some of the principal buildings.
Question: What did Planalto create his designs for?

Output:
unanswerable