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_mqw6x4dk):
Calculate -1 * -8.

Question 1 (Question id: q_byldCWbz):
Calculate ( ( 5 - 3 ) / 1 ).



Produce a JSON object whose top-level keys are the question ids.

Each key’s value must be an object holding an 'answer' field.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
For string answers, include 'first_char' with the answer’s initial letter.
If the question asks for the last character of a string, add an 'original_string' field containing the source string.

Now provide the result JSON using the described format.

{"ground_truth": {"q_mqw6x4dk": {"answer": 8, "half_answer": 4}, "q_byldCWbz": {"answer": 2, "half_answer": 1}}}