| http://www.w3.org/ns/prov#value | - In addition the device is advantageously provided with a power switch, a switch for selecting the numeral to be used as the base numeral, a switch for selecting game rules (e.g., whether all player stations are interrogated, whether players are addressed in sequence or at random, and whether they are eliminated or retained after an error), a switch for selecting how quickly a player must respond,
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