Check the list of articles against the archive of published articles below and remove ones that have already been published.
The output should be exactly the same as the input list, but with the published articles removed.


Importantly, do not include the file delimiter like below:

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Start of File: Most Cited Article.txt
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End of File: Most Cited Article.txt
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Only incluse the content of the file which is the text in between these delimiters.