Bionto 'believe, remember' and glofu 'believe' are closest to meaning 'think'. Bionto is of low frequency, and attested only with full complement clauses (CPs) introduced by a null complementizer. Glofu is of somewhat higher frequency, and attested with full complement clauses introduced by the complementizer dati 'that', by the serial complementizer bi(fi) 'say', and by a null complementizer.
Suku 'want' subcategorizes for nonfinite complement clauses, where no complementizer position is available.
Source: Kouwenberg 1994: 324
Source: Kouwenberg 1994: 351
Source: Kouwenberg 1994: 336
Source: Kouwenberg 1994: 604
Source: Kouwenberg 1994: 604