(i) The judge considered him a reliable witness.
(ii) The judge considered him to be a a reliable witness.
(iii) The judge considered that he was a reliable witness.
(i) S + V + O + C;
(ii) S + V + O + C, or (alternatively) S + V + O;
(iii) S + V + O.
S - a subject, V - a verb (predicator), O - an object, C - a complement.
Is my parsing acceptable?
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