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_VEQEk):
Calculate 4 - 8 * -3.

Question 1 (Question id: q_o28aaQFc):
How many times does the letter "r" appear in the text: "and terrestrial"? Respond with an integer.



Output JSON where all question ids are keys, omitting q_o28aaQFc.

For every question id, supply an object whose 'answer' field stores the solution.
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.
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_VEQEk": {"answer": 28, "half_answer": 14}}}