| prov:value
| - Each of the nodes 111, 121, 131, 141-1, 141-2, . . . , 141-n, 151-1, 151-2, 151-n includes a general computer arrangement, and comprises a data processing device 201 a, 201 b, 201 c, 201 d or 201 e, a data I/O device 202 a, 202 b, 202 c, 202 d or 202 e such as a keyboard, a mouse and a display, and a data storage device 203 a, 203 b, 203 c, 203 d or 203 e such as a disk device.
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