"question concerned" is correct and usable in written English.
You can use this phrase when you are asking a question about a specific topic. For example: "What is the question concerned with?".
On Monday, the final question concerned Trump's promised border wall.
The rule in question concerned trading in the energy business.
Dr Knapman's final question concerned the speed of death.
The crown-and-clergy "reserves" question concerned the existence of large tracts of unimproved lands.
Anoth er major question concerned the political' effects of the case.
The ball was safely in his hands, but the bigger question concerned his feet.
One unanswered question concerned the presence of a mysterious, low-ranking Nazi official at the nuptials.
The breakthrough goal had been signposted but the question concerned whether Ireland could locate it.
Powdery mildew has already struck my bee balm, so my next question concerned control measures.
The question concerned if discrete event simulation can verify production system capabilities even in early conceptual design stages.
Our main question concerned the factors driving the overall evaluation of the meal at its conclusion and after three months.
