فِي الْقَاعَةِ طَالِبٌ.
There is a student in the hall.
The prepositional predicate comes first, placing the location at the head of the utterance and the indefinite student later. This can answer a question about who or what is in the hall.
Grammatical licensing and rhetorical value are distinct: the construction is valid grammatically, while its appropriateness depends on the discourse question.