Input: Read this: Following the war, some of these military airfields added civil facilities for handling passenger traffic. One of the earliest such fields was Paris Le Bourget Airport at Le Bourget, near Paris. The first airport to operate scheduled international commercial services was Hounslow Heath Aerodrome in August 1919, but it was closed and supplanted by Croydon Airport in March 1920. In 1922, the first permanent airport and commercial terminal solely for commercial aviation was opened at Flughafen Devau near what was then Konigsberg, East Prussia. The airports of this era used a paved "apron", which permitted night flying as well as landing heavier aircraft.
Question: Following the war, why did some military airfields add civil facilities?

Output: for handling passenger traffic

Input: Read this: At the beginning of the 13th century, there were reasonably accurate Latin translations of the main works of almost all the intellectually crucial ancient authors, allowing a sound transfer of scientific ideas via both the universities and the monasteries. By then, the natural philosophy contained in these texts began to be extended by notable scholastics such as Robert Grosseteste, Roger Bacon, Albertus Magnus and Duns Scotus. Precursors of the modern scientific method, influenced by earlier contributions of the Islamic world, can be seen already in Grosseteste's emphasis on mathematics as a way to understand nature, and in the empirical approach admired by Bacon, particularly in his Opus Majus. Pierre Duhem's provocative thesis of the Catholic Church's Condemnation of 1277 led to the study of medieval science as a serious discipline, "but no one in the field any longer endorses his view that modern science started in 1277". However, many scholars agree with Duhem's view that the Middle Ages were a period of important scientific developments.
Question: What era was important for scientific advancements?

Output: the Middle Ages

Input: Read this: With an estimated population of 1,381,069 as of July 1, 2014, San Diego is the eighth-largest city in the United States and second-largest in California. It is part of the San DiegoTijuana conurbation, the second-largest transborder agglomeration between the US and a bordering country after DetroitWindsor, with a population of 4,922,723 people. San Diego is the birthplace of California and is known for its mild year-round climate, natural deep-water harbor, extensive beaches, long association with the United States Navy and recent emergence as a healthcare and biotechnology development center.
Question: What is unique about San Diego's harbors?

Output: deep-water

Input: Read this: The University of Notre Dame has made being a sustainability leader an integral part of its mission, creating the Office of Sustainability in 2008 to achieve a number of goals in the areas of power generation, design and construction, waste reduction, procurement, food services, transportation, and water.As of 2012[update] four building construction projects were pursuing LEED-Certified status and three were pursuing LEED Silver. Notre Dame's dining services sources 40% of its food locally and offers sustainably caught seafood as well as many organic, fair-trade, and vegan options. On the Sustainable Endowments Institute's College Sustainability Report Card 2010, University of Notre Dame received a "B" grade. The university also houses the Kroc Institute for International Peace Studies. Father Gustavo Gutierrez, the founder of Liberation Theology is a current faculty member.
Question: Notre Dame got a "B" for its sustainability practices from which entity?

Output:
Sustainable Endowments Institute