| http://www.w3.org/ns/prov#value | - a plurality of sensors adapted to be attached to a living being so as to generate a corresponding plurality of sensor signals, at least one of said sensors comprising an optical sensor outputting a first signal of said at least one of said plurality of sensor signals, said first signal indicative of a blood parameter including at least one of oxygen saturation, methemoglobin, or carboxyhemoglobin;
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