| http://www.w3.org/ns/prov#value | - (a) a wireless device associated with a door and configured to communicate audio and video data, the wireless device including a camera, a microphone, a speaker, an RF transmitter, and an RF receiver; (b) a plurality of peripheral devices, each peripheral device associated with a respective user; and (c) a computer configured for communication with the wireless device and configured for communicat
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