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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A circadian rhythm /sɜrˈkeɪdiən/ is any biological process that displays an endogenous, entrainable oscillation of about 24 hours. These 24-hour rhythms are driven by a circadian clock, and they have been widely observed in plants, animals, fungi, and cyanobacteria.The term circadian comes from the Latin circa, meaning \"around\" (or \"approximately\"), and diēs, meaning \"day\"." ] ,
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