Single NP object = NP-OB2
From Icelandic Parsed Historical Corpus (IcePaHC)
NP-OB2 with cognate object verbs
(IP-SUB (NP-SBJ (PRO-N vér-ég)) (VBDI hlupum-hlaupa) (PP (P yfir-yfir) (NP (N-A slotspláss$-slotspláss) (D-A $ið-hinn))) (NP-OB2 (N-A kapphlaup-kapphlaup))))
Various other examples
(IP-SUB (NP-SBJ (N-N engi-enginn) (N-N maður-maður)) (PP (P í-í) (NP (D-D því-sá) (N-D landi-land))) (VBDI stóðst-standa) (NP-OB2 (PRO-D honum-hann)) (CONJ-1 hvorki-hvorki) (PP (P um-um) (NP (CONJ *ICH*-1) (N-A afl-afl) (CONJ né-né) (NS-A íþróttir-íþrótt)))))) (. .-.)))