| http://www.w3.org/ns/prov#value | - means and the second means. [0020] In yet another aspect of the present invention, there is a method of mopping a surface with a floor mopping device, the method comprising a) connecting a roll of webbing on a feed roller to a take-up roller, b) moving the floor mopping device without human intervention, c) pressing on a portion of the webbing such that the webbing cleans the surface, and d) trans
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