| http://www.w3.org/ns/prov#value | - If the device 220 is a light for example, the light will come on for a pre-determined time period that is of a short duration, such as for example 30 seconds to a minute.If the device 200 of FIG. 2 detects an object in the field of view 106 and the duration of the detection is more than 30 seconds (F1 is ???frequent???), signal 204a is generated with a corresponding duration.
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