| http://www.w3.org/ns/prov#value | - Harry did not see any reason to cast the simple light spell verbally, as any professor or prefect who managed to slip past his notice would hear him sooner than see him, and he did not relish the idea of being caught after hours in a place he wasn't supposed to be.As he walked deeper into the library with no real purpose other than to find something interesting, he realized that the fact that the
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