| http://www.w3.org/ns/prov#value | - (a) a cylinder housed within and rotatable with respect to a shell; (b) an electrically powered locking mechanism capable of selectively interfering with rotation of said cylinder, said locking mechanism including a solenoid having a solenoid coil and a solenoid plunger, said solenoid plunger being in a first position when said lacking mechanism interferes with rotation of said cylinder, and said
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