Single NP object = NP-OB2
From Icelandic Parsed Historical Corpus (IcePaHC)
NP-OB2 with certain cognate object verbs
Cognate objects are usually parsed as NP-OB1. Examples are segja sögu, drekka drykk (þorstadrykk), sjá sýn.
There are, however, a few exceptions to this.
Verbs like HJÁLPA 'help' and BIÐJA (BÆNAR) 'pray' (and a few others) are treated as taking an NP-OB2, that is, the superficial object is NP-OB2 because these are treated as taking an abstract NP-OB1. See further details in PPCEME.
Other superficial objects of cognate object verbs are treated as NP-OB1.
(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-OB1 (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)))))) (. .-.)))