Input: Read this: In April 2008, a 90m contract was signed with Boeing for a "quick fix" solution, so they can fly by 2010: QinetiQ will downgrade the Chinooksstripping out some of their more advanced equipment.
Question: When was the Boeing contract signed?

Output: April 2008

Input: Read this: In the groups Z/nZ introduced above, the element 1 is primitive, so these groups are cyclic. Indeed, each element is expressible as a sum all of whose terms are 1. Any cyclic group with n elements is isomorphic to this group. A second example for cyclic groups is the group of n-th complex roots of unity, given by complex numbers z satisfying zn = 1. These numbers can be visualized as the vertices on a regular n-gon, as shown in blue at the right for n = 6. The group operation is multiplication of complex numbers. In the picture, multiplying with z corresponds to a counter-clockwise rotation by 60. Using some field theory, the group Fp can be shown to be cyclic: for example, if p = 5, 3 is a generator since 31 = 3, 32 = 9 4, 33 2, and 34 1.
Question: What are numbers on an irregular n-gon?

Output: unanswerable

Input: Read this: The Community Tool Box is a public service of the University maintained by the Work Group for Community Health and Development. It is a free, online resource that contains more than 7,000 pages of practical information for promoting community health and development, and is a global resource for both professionals and grassroots groups engaged in the work of community health and development.
Question: What kinds of groups around the world are harmed from the Community Tool Box?

Output: unanswerable

Input: Read this: Nanjing's airport, Lukou International Airport, serves both national and international flights. In 2013, Nanjing airport handled 15,011,792 passengers and 255,788.6 tonnes of freight. The airport currently has 85 routes to national and international destinations, which include Japan, Korea, Thailand, Malaysia, Singapore, USA and Germany. The airport is connected by a 29-kilometre (18 mi) highway directly to the city center, and is also linked to various intercity highways, making it accessible to the passengers from the surrounding cities. A railway Ninggao Intercity Line is being built to link the airport with Nanjing South Railway Station. Lukou Airport was opened on 28 June 1997, replacing Nanjing Dajiaochang Airport as the main airport serving Nanjing. Dajiaochang Airport is still used as a military air base.
Question: When did the airport open for business?

Output:
28 June 1997