There is disclosed a device adapted to provide water purified to human consumption level, and arranged for connection to a water supply. The video camera system is configured to capture photographs of a subject positioned between the video camera system and a background. It is also preferred that the step of calculating a value representative of the similarity between the portions of text for each of the classes of agreement include the application of a weighting factor to the estimate of similarity for each of the classes of agreement and the parts of speech in which matched terms occur. In one particular implementation, the anode includes several slots and the formation cathodes are plates that are inserted into the slots.