Input: Read this: Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 has the distinction of being the only naturally occurring fissile isotope. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. While uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons, uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating.
Question: Along with uranium-235, what isotope is noted for having a low fission cross-section for slow neutrons?

Output: unanswerable


Input: Read this: Finally, in the 1990s, Internet Protocol-based videoconferencing became possible, and more efficient video compression technologies were developed, permitting desktop, or personal computer (PC)-based videoconferencing. In 1992 CU-SeeMe was developed at Cornell by Tim Dorcey et al. In 1995 the first public videoconference between North America and Africa took place, linking a technofair in San Francisco with a techno-rave and cyberdeli in Cape Town. At the Winter Olympics opening ceremony in Nagano, Japan, Seiji Ozawa conducted the Ode to Joy from Beethoven's Ninth Symphony simultaneously across five continents in near-real time.
Question: What South African city participated in the first public video-conference?

Output: Cape Town


Input: Read this: Not all introduced species are invasive, nor all invasive species deliberately introduced. In cases such as the zebra mussel, invasion of US waterways was unintentional. In other cases, such as mongooses in Hawaii, the introduction is deliberate but ineffective (nocturnal rats were not vulnerable to the diurnal mongoose). In other cases, such as oil palms in Indonesia and Malaysia, the introduction produces substantial economic benefits, but the benefits are accompanied by costly unintended consequences.
Question: What animal unintentionally invaded Hawaii?

Output: unanswerable


Input: Read this: Programmes, such as the politically fuelled Give My Head Peace (produced by BBC Northern Ireland) and the soap opera River City (produced by BBC Scotland), have been created specifically to cater for some viewers in their respective nations, who may have found programmes created for English audiences irrelevant. BBC Scotland produces daily programmes for its Gaelic-speaking viewers, including current affairs, political and children's programming such as the popular Eòrpa and Dè a-nis?. BBC Wales also produces a large amount of Welsh language programming for S4C, particularly news, sport and other programmes, especially the soap opera Pobol y Cwm ('People of the Valley'). The UK nations also produce a number of programmes that are shown across the UK, such as BBC Scotland's comedy series Chewin' the Fat, and BBC Northern Ireland's talk show Patrick Kielty Almost Live.
Question: What is the name of a show from Northern Ireland broadcast all over the United Kingdom?

Output:
Patrick Kielty Almost Live