This HTML5 document contains 7 embedded RDF statements represented using HTML+Microdata notation.

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isahttp://webisa.webdatacommons.org/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
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For example, a disinfectant such as iodine or chlorine must be mixed and in contact with the water for up to several minutes, which could not be accomplished with known portable water filtering devices.
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