Words for 'somebody' and 'something' do not behave in the same manner. 'Somebody' is expressed by the construction with the word liudi 'person', while 'something' is often expressed by the reduplicated interrogative pronoun chiwo-chiwo, cho-cho 'what-what'; in some cases the reduplication is omited.
Source: Arsen’ev 1949: 26
Source: Perekhvalskaya 2008: 221