Assertion: parody | /r/CapableOf | present unique difficulty
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Source sentences:
text: As to the third factor, the amount and substantiality of the portion used in relation to the copyrighted work, the Court indicated that a parody presents a unique difficulty when evaluating the amount of copying because the success of a parody depends upon its use of the original work while its "art lies in the tension between a known original and its parodic twin.