Input: Article: The work of children was important in pre-industrial societies, as children needed to provide their labour for their survival and that of their group. Pre-industrial societies were characterised by low productivity and short life expectancy, preventing children from participating in productive work would be more harmful to their welfare and that of their group in the long run. In pre-industrial societies, there was little need for children to attend school. This is especially the case in non literate societies. Most pre-industrial skill and knowledge were amenable to being passed down through direct mentoring or apprenticing by competent adults.

Now answer this question: Who taught the skills needed for the children to work?

Output: competent adults

Input: Article: For many years Arsenal's away colours were white shirts and either black or white shorts. In the 1969–70 season, Arsenal introduced an away kit of yellow shirts with blue shorts. This kit was worn in the 1971 FA Cup Final as Arsenal beat Liverpool to secure the double for the first time in their history. Arsenal reached the FA Cup final again the following year wearing the red and white home strip and were beaten by Leeds United. Arsenal then competed in three consecutive FA Cup finals between 1978 and 1980 wearing their "lucky" yellow and blue strip, which remained the club's away strip until the release of a green and navy away kit in 1982–83. The following season, Arsenal returned to the yellow and blue scheme, albeit with a darker shade of blue than before.

Now answer this question: What did Arsenal consider the yellow and blue colors to be after losing a FA Cup final wearing red and white?

Output: lucky

Input: Article: Like other American research universities, Northwestern was transformed by World War II. Franklyn B. Snyder led the university from 1939 to 1949, when nearly 50,000 military officers and personnel were trained on the Evanston and Chicago campuses. After the war, surging enrollments under the G.I. Bill drove drastic expansion of both campuses. In 1948 prominent anthropologist Melville J. Herskovits founded the Program of African Studies at Northwestern, the first center of its kind at an American academic institution. J. Roscoe Miller's tenure as president from 1949 to 1970 was responsible for the expansion of the Evanston campus, with the construction of the lakefill on Lake Michigan, growth of the faculty and new academic programs, as well as polarizing Vietnam-era student protests. In 1978, the first and second Unabomber attacks occurred at Northwestern University. Relations between Evanston and Northwestern were strained throughout much of the post-war era because of episodes of disruptive student activism, disputes over municipal zoning, building codes, and law enforcement, as well as restrictions on the sale of alcohol near campus until 1972. Northwestern's exemption from state and municipal property tax obligations under its original charter has historically been a source of town and gown tension.

Now answer this question: What center was founded by Melville J. Herskovits in 1948?

Output:
Program of African Studies at Northwestern