Here is a set of basic questions producing integer or string outputs. Answer them and format the result precisely with the JSON instructions provided:

Question 0 (Question id: q_IHhu):
Calculate 2 / 2.

Question 1 (Question id: q_r9HVC):
How many times does the letter "v" appear in the text: "discover a"? Respond with an integer.

Question 2 (Question id: q_dPVAltPt):
Determine the value of a that satisfies: 15 - 4*a = -21 Respond with an integer.



Your output must be a JSON mapping every question id to its answer info.

The value for each key should be an object that contains the answer in the field 'answer'.
If the response to a question is an integer that is even, also add the field 'half_answer' to the object which contains the answer integer divided by two.
For string answers, include 'first_char' with the answer’s initial letter.

Now provide the result JSON using the described format.

{"ground_truth": {"q_IHhu": {"answer": 1}, "q_r9HVC": {"answer": 1}, "q_dPVAltPt": {"answer": 9}}}