| http://www.w3.org/ns/prov#value | - The hierarchy can be described as follows: Level 1 - observable inputs such as quoted prices in active markets; Level 2 - inputs other than the quoted prices in active markets that are observable either directly or indirectly; and Level 3 - unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.
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