| http://www.w3.org/ns/prov#value | - g medium based on the printing data; [0025] a second step of providing a notification about a measured residual amount of each of the two or more kinds of printing agents each having the different color and a notification about an amount of each of the two or more kinds of printing agents each having the different color predicted to be consumed to do printing, a notification prompting for an instr
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