Relative clauses are most often introduced by the all-purpose relativizer wati. In Kouwenberg (1994: 370ff), I argue that wati may be a complementizer rather than a relative pronoun. One argument in favor of this analysis is provided by the occurrence of resumptive pronouns in quite a few cases. Another is the occasional use of complementizer dati in its place.
A zero-relativized clause in which the relativized element is the object is attested only for the verb rupu 'call, name'.
Source: Kouwenberg 1994: 371
Source: Kouwenberg 1994: 361
Source: Kouwenberg 1994: 378