Citation Needed

Under 1s1s1c, I feel the second-to-last line needs to be cited and is not. However, I don't know how to make a superscript that says "citation needed."
-unsigned comment by Iri-O (talk | contribs)

Is this supposed to be a challenge?

By reading this, It looks like a challenge, but it does not explicitly say that. If it is, could someone add that?
-unsigned comment by Scratchmaster295 (talk | contribs)

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