| http://www.w3.org/ns/prov#value | - tion tracks contains information messages related in real time and content to each other, such as will be described with reference to FIG. 10 by way of example, or a plurality of separate tapes whose operation is synchronized so as to relate the information messages or segments contained on the various tapes in real time and content to each other, or synchronized video discs, or any other conventi
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