It means, "...a question about..."
has responded to question about
"Una pregunta" means "a question" in English.
"Una pregunta sobre otra persona". That's your sentence translated into Spanish.
Tengo una pregunta. However...if you ASK a question, you would use "hacer una pregunta".
I have a question.
"Who are you?" -
Hola tengo una pregunta sobre un honda del 91
Esta pregunta necesita más información; un verbo ayudaría mucho y también una palabra interrogadora.
It means 'Choose one question'.
I have a question.
Una pregunta mas means One more question.
It means, "That is a crazy question."