Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
General Electric heavily contaminated the Hudson River with polychlorinated biphenyls (PCBs) between 1947-77. This pollution caused a range of harmful effects to wildlife and people who eat fish from the river or drink the water. In response to this contamination, activists protested in various ways. Musician Pete Seeger founded the Hudson River Sloop Clearwater and the Clearwater Festival to draw attention to the problem. The activism led to the site being designated by the EPA as one of the superfund sites requiring extensive cleanup. Other sources of pollution, including mercury contamination and sewage dumping, have also contributed to problems in the Hudson River watershed.
In what year did the EPA designate GE's plant on the Hudson River as a superfund site?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the high Renaissance, in fact, there was a hope that more direct knowledge of the wisdom of antiquity, including the writings of the Church fathers, the earliest known Greek texts of the Christian Gospels, and in some cases even the Jewish Kabbalah, would initiate a harmonious new era of universal agreement. With this end in view, Renaissance Church authorities afforded humanists what in retrospect appears a remarkable degree of freedom of thought. One humanist, the Greek Orthodox Platonist Gemistus Pletho (1355–1452), based in Mystras, Greece (but in contact with humanists in Florence, Venice, and Rome) taught a Christianised version of pagan polytheism.
What is one religious text that was thought to eventually lead to a war between all?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Motorcycles are also commonly used, particularly in locations that a car may not be able to reach, to control potential public order situations involving meetings of motorcyclists and often in escort duties where motorcycle police officers can quickly clear a path for escorted vehicles. Bicycle patrols are used in some areas because they allow for more open interaction with the public. In addition, their quieter operation can facilitate approaching suspects unawares and can help in pursuing them attempting to escape on foot.
What do police use to control motorcyclist events?
A: Motorcycles

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Less than 1% of all species that have been described have been studied beyond simply noting their existence. The vast majority of Earth's species are microbial. Contemporary biodiversity physics is "firmly fixated on the visible [macroscopic] world". For example, microbial life is metabolically and environmentally more diverse than multicellular life (see e.g., extremophile). "On the tree of life, based on analyses of small-subunit ribosomal RNA, visible life consists of barely noticeable twigs. The inverse relationship of size and population recurs higher on the evolutionary ladder—"to a first approximation, all multicellular species on Earth are insects". Insect extinction rates are high—supporting the Holocene extinction hypothesis. 
What type of life is more enviromentally diverse than multicellular life?
A:
microbial life