In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Ex Input:
What led to the result that observers in relative motion measure different elapsed times?, Context: In non-relativistic classical mechanics, Newton's concept of "relative, apparent, and common time" can be used in the formulation of a prescription for the synchronization of clocks. Events seen by two different observers in motion relative to each other produce a mathematical concept of time that works sufficiently well for describing the everyday phenomena of most people's experience. In the late nineteenth century, physicists encountered problems with the classical understanding of time, in connection with the behavior of electricity and magnetism. Einstein resolved these problems by invoking a method of synchronizing clocks using the constant, finite speed of light as the maximum signal velocity. This led directly to the result that observers in motion relative to one another measure different elapsed times for the same event.

Ex Output:
a method of synchronizing clocks


Ex Input:
What is needed to gain strength?, Context: The Armed Forces are today funded by approximately $20.1 billion annually and are presently ranked 74th in size compared to the world's other armed forces by number of total personnel, and 58th in terms of active personnel, standing at a strength of roughly 68,000, plus 27,000 reservists, 5000 Rangers, and 19,000 supplementary reserves, bringing the total force to approximately 119,000. The number of primary reserve personnel is expected to go up to 30,000 by 2020, and the number of active to at least 70,000. In addition, 5000 rangers and 19,000 supplementary personnel will be serving. If this happens the total strength would be around 124,000. These individuals serve on numerous CF bases located in all regions of the country, and are governed by the Queen's Regulations and Orders and the National Defence Act.

Ex Output:
The number of primary reserve personnel is expected to go up


Ex Input:
What did the report measure in various cities?, Context: In a report, published in early February 2007 by the Ear Institute at the University College London, and Widex, a Danish hearing aid manufacturer, Newcastle was named as the noisiest city in the whole of the UK, with an average level of 80.4 decibels. The report claimed that these noise levels would have a negative long-term impact on the health of the city's residents. The report was criticized, however, for attaching too much weight to readings at arbitrarily selected locations, which in Newcastle's case included a motorway underpass without pedestrian access.

Ex Output:

noise levels