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

Example Input: Glass that has been covered with ash or soot on one one side to obscure light is called?, Context: Historically, pubs have been socially and culturally distinct from cafés, bars and German beer halls. Most pubs offer a range of beers, wines, spirits, and soft drinks and snacks. Traditionally the windows of town pubs were of smoked or frosted glass to obscure the clientele from the street but from the 1990s onwards, there has been a move towards clear glass, in keeping with brighter interiors.
Example Output: smoked

Example Input: Whose submarines, between the Germans and Soviets, were the Bermuda bases first used to look out for?, Context: Construction began in 1941 of two airbases consisting of 5.8 km2 (2.2 sq mi) of land, largely reclaimed from the sea. For many years, Bermuda's bases were used by US Air Force transport and refuelling aircraft and by US Navy aircraft patrolling the Atlantic for enemy submarines, first German and, later, Soviet. The principal installation, Kindley Air Force Base on the eastern coast, was transferred to the US Navy in 1970 and redesignated Naval Air Station Bermuda. As a naval air station, the base continued to host both transient and deployed USN and USAF aircraft, as well as transitioning or deployed Royal Air Force and Canadian Forces aircraft.
Example Output: German

Example Input: what was used for road building?, Context: The era of planning in Himachal Pradesh started 1948 along with the rest of India. The first five-year plan allocated ₹ 52.7 million to Himachal. More than 50% of this expenditure was incurred on road construction since it was felt that without proper transport facilities, the process of planning and development could not be carried to the people, who mostly lived an isolated existence in far away areas. Himachal now ranks fourth in respect of per capita income among the states of the Indian Union.
Example Output:
50% of this expenditure