I agree with your approach to the "single phrase," although the expression "noun phrase" is used variously in these fora. (I can't say how it functions in the sentence without seeing the sentence. ) "Confirmed" has more than one possible sense here.
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Avangialthough the expression "noun phrase" is used variously in these fora.noun phrase
(I can't say how it functions in the sentence without seeing the sentence. If you mean, "it begins with a noun," that's cool.)