{HEAD ~ The system} comprises {TAIL ~ a plurality} of magnetic sensors, each of which is oriented in a known direction and generates a set of signals as a function of the static magnetic field strength and direction due to each of the plurality of magnets 
comprises
{ HEAD ~ The system } comprises { TAIL ~ a plurality } of magnetic sensors , each of which is oriented in a known direction and generates a set of signals as a function of the static magnetic field strength and direction due to each of the plurality of magnets
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