Input: Read this: Yale has a complicated relationship with its home city; for example, thousands of students volunteer every year in a myriad of community organizations, but city officials, who decry Yale's exemption from local property taxes, have long pressed the university to do more to help. Under President Levin, Yale has financially supported many of New Haven's efforts to reinvigorate the city. Evidence suggests that the town and gown relationships are mutually beneficial. Still, the economic power of the university increased dramatically with its financial success amid a decline in the local economy.
Question: Which Yale president assisted with New Haven's revitalization efforts?

Output: President Levin


Input: Read this: As a defining aspect of what it means to be human, culture is a central concept in anthropology, encompassing the range of phenomena that are transmitted through social learning in human societies. The word is used in a general sense as the evolved ability to categorize and represent experiences with symbols and to act imaginatively and creatively. This ability arose with the evolution of behavioral modernity in humans around 50,000 years ago.[citation needed] This capacity is often thought to be unique to humans, although some other species have demonstrated similar, though much less complex abilities for social learning. It is also used to denote the complex networks of practices and accumulated knowledge and ideas that is transmitted through social interaction and exist in specific human groups, or cultures, using the plural form. Some aspects of human behavior, such as language, social practices such as kinship, gender and marriage, expressive forms such as art, music, dance, ritual, religion, and technologies such as cooking, shelter, clothing are said to be cultural universals, found in all human societies. The concept material culture covers the physical expressions of culture, such as technology, architecture and art, whereas the immaterial aspects of culture such as principles of social organization (including, practices of political organization and social institutions), mythology, philosophy, literature (both written and oral), and science make up the intangible cultural heritage of a society.
Question: What does the term "concept immaterial culture" cover?

Output: unanswerable


Input: Read this: Before the introduction of the brown tree snake, Guam was home to several endemic bird species. Among them were the Guam rail (or ko'ko' bird in Chamorro) and the Guam flycatcher, both common throughout the island. Today the flycatcher is entirely extinct while the Guam rail is extinct in the wild but bred in captivity by the Division of Aquatic and Wildlife Resources. The devastation caused by the snake has been significant over the past several decades. As many as twelve bird species are believed to have been driven to extinction. According to many elders, ko'ko' birds were common in Guam before World War II.
Question: What was the most populous Guam bird prior to World War II?

Output: unanswerable


Input: Read this: In April 2010, Shell announced its intention to divest from downstream business of all African countries except South Africa and Egypt to Vitol and "Helios". In several countries such as Tunisia, protests and strikes broke out. Shell denied rumours of the sellout. Shell continues however upstream activities/extracting crude oil in the oil-rich Niger Delta as well as downstream/commercial activities in South Africa. In June 2013, the company announced a strategic review of its operations in Nigeria, hinting that assets could be divested. In August 2014, the company disclosed it was in the process of finalizing the sale of its interests in four Nigerian oil fields.
Question: When did protests break out in South Africa?

Output:
unanswerable