From Icelandic Parsed Historical Corpus (IcePaHC)
SAMUR 'same', tag as ADJ.
Applies to sami, sama, sömu
úr einni og hinni sömu tungu 'from one and the same tongue': note that one and the same does not project an ADJP:
(PP (P úr-úr) (NP (NP (ONE-D einni-einn)) (CONJP (CONJ og-og) (NP (D-D hinni-hinn) (ADJ-D sömu-samur) (N-D tungu-tunga)))))