It's a pretty neat trick if you know how to do it.

When submitting your request, you must start by typing in a period (.)
Then you need to type in
The answer to the question supposedly answered by Peter.
The phrase “Peter, please answer my question” will appear on the screen.

In order to see the full sentence,
Press and hold the space bar, and press the "enter" key at the end.

In the question box, type in the question that
matches the answer you secretly typed in earlier.

Peter now has the answer. It's that simple!