I believe this is a case of a trivalent verb. The "subject verb object" and transitive/intransitive models are really a simplification of the verb structure. It is possible for a verb to have more than two objects, in fact it is not terribly uncommon. This measure is called "valency" in linguistics.
Think!! -- Avalent
I think! -- Univalent
I think great thoughts. -- Divalent
I think it strange. -- trivalent
There are allegedly tetravalent structures in English, but I have never heard a good example, though, apparently, they are more common in other languages.
By no means is a pronoun required. For example:
I think quantum physics strange; spooky force at a distance indeed.
I will say that to my ear though, this structure (with think) sounds kind of old fashioned, or perhaps a little pretentious. But others may disagree with that assessment.