EINS OG

EINS OG is always treated as taking a full clausal comparative, parallel to CP-CMP#EN_(BETUR_EN_(CP-CMP)_...) comparatives with EN. This is true even if only a single (nominative) NP follows OG, as below.

( (ADJP (ADVR eins)
        (PP (P og)
            (NP (NPR Bill))))

( (IP-MAT (NP-SBJ (NPR-N Indriði-indriði))
	  (VBDI gekk-ganga)
	  (RP (RP til-til) (CONJ og-og) (RP frá-frá))
	  (ADJP (ADVR eins-eins)
		(PP (P og-og)
		    (NP (OTHERS-N aðrir-annar) (NS-N sveinar-sveinn))))
	  (. ,-,)))

See ADVR heads of ADJP

For a comparative with clausal structure, see: CP-CMP