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 Superman II's critical commentary of this poem 

I removed an extensive quote from Superman II regarding this poem, and it was reverted. Is Superman II so well-regarded as a source of poetic critical commentary that we must include this? What is the justification for keeping this lengthy excerpt over anything else, given that the quote is just one of a million pop culture references to this poem? How does this help the user to understand the subject better, other than learning that a scriptwriter somewhere didn't like it?   "