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_pxdKBf):
Calculate 1 + -2 - -8.

Question 1 (Question id: q_HujLBc):
Calculate ( 6 + -4 ).



Output JSON where all question ids are keys, omitting q_HujLBc.

The value for each key should be an object that contains the answer in the field 'answer'.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
For string answers, include 'first_char' with the answer’s initial letter.

Add a top-level 'global_metadata' field that records overall stats:
• num_questions_asked: how many questions were asked in total.

In addition, add 'combined_results' with:
  • integer_info: per-id integer answers
  • sum_of_answers: their total

Now provide the result JSON using the described format.

{"ground_truth": {"q_pxdKBf": {"answer": 7}, "global_metadata": {"num_questions_asked": 2}, "combined_results": {"integer_info": {"q_pxdKBf": 7}, "sum_of_answers": 7}}}