طَلَبُ تَصَوُّرِ الْمُسْنَدِ إِلَيْهِ
Seeking identification of the subject of predication.
The relevant background knowledge determines what remains open. If the standing is known to have occurred, the actor can still be unknown; if the actor is given, the occurrence itself may be unsettled.
This is why the difference between “A-Zaydun qāma?” and “A-qāma Zaydun?” is fully understood only with the discourse context. Literal glosses alone do not capture the precise question focus.