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_DIPkz1IO):
Your job is to return the last character of a string as a string. For example, the last char of "hello" is "o". Return the last character of the following string: "event"

Question 1 (Question id: q_jVJIuBVi):
Calculate -7 * -2 - -7.

Question 2 (Question id: q_COIN91Bm):
Calculate 5 + 3 / 1.



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

For every question id, supply an object whose 'answer' field stores the solution.
For even integers, nest 'half_answer' and 'double_answer' inside an additional 'additional_answer_info' field in the answer object.
If the question asks for the last character of a string, add an 'original_string' field containing the source string.

Beyond the question-id fields, add a 'global_metadata' object with summary information:
'num_questions_asked' should equal the total questions that appeared.
Add 'num_questions_answered' showing how many questions you answered.
Fill 'questions_with_integer_answers' with the ids of integer-answer questions (leave empty when none).

Now provide the result JSON using the described format.

{"ground_truth": {"q_DIPkz1IO": {"answer": "t", "original_string": "event"}, "q_jVJIuBVi": {"answer": 21}, "q_COIN91Bm": {"answer": 8, "additional_answer_info": {"half_answer": 4, "double_answer": 16}}, "global_metadata": {"num_questions_asked": 3, "num_questions_answered": 3, "questions_with_integer_answers": ["q_jVJIuBVi", "q_COIN91Bm"]}}}