| http://www.w3.org/ns/prov#value | - ime expires and given at least 20 seconds to extend the time limit with a simple action (for example, ???press the space bar???), and the user is allowed to extend the time limit at least ten times; or Real-time Exception: The time limit is a required part of a real-time event (for example, an auction), and no alternative to the time limit is possible; or Essential Exception: The time limit is ess
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