instruction:
In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
question:
Who practices SODIS?, Context: Solar water disinfection (SODIS) involves exposing water-filled plastic polyethylene terephthalate (PET) bottles to sunlight for several hours. Exposure times vary depending on weather and climate from a minimum of six hours to two days during fully overcast conditions. It is recommended by the World Health Organization as a viable method for household water treatment and safe storage. Over two million people in developing countries use this method for their daily drinking water.
answer:
Over two million people


question:
Why were 78s more popular than 45s in 1954-55?, Context: Some of Elvis Presley's early singles on Sun Records might have sold more copies on 78 than on 45. This is because the majority of those sales in 1954–55 were to the "hillbilly" market in the South and Southwestern United States, where replacing the family 78 rpm player with a new 45 rpm player was a luxury few could afford at the time. By the end of 1957, RCA Victor announced that 78s accounted for less than 10% of Presley's singles sales, essentially announcing the death throes of the 78 rpm format. The last Presley single released on 78 in the United States was RCA Victor 20-7410, I Got Stung/One Night (1958), while the last 78 in the UK was RCA 1194, A Mess Of Blues/Girl Of My Best Friend (1960).
answer:
replacing the family 78 rpm player with a new 45 rpm player was a luxury few could afford


question:
Hoe do you celebrate?, Context: Burke took a leading role in the debate regarding the constitutional limits to the executive authority of the king. He argued strongly against unrestrained royal power and for the role of political parties in maintaining a principled opposition capable of preventing abuses, either by the monarch, or by specific factions within the government. His most important publication in this regard was his Thoughts on the Cause of the Present Discontents of 23 April 1770. Burke identified the "discontents" as stemming from the "secret influence" of a neo-Tory group he labelled as, the "king's friends", whose system "comprehending the exterior and interior administrations, is commonly called, in the technical language of the Court, Double Cabinet". Britain needed a party with "an unshaken adherence to principle, and attachment to connexion, against every allurement of interest". Party divisions "whether operating for good or evil, are things inseparable from free government".
answer:
Party