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_B8ttO):
Find the value of f in the equation: 19 - 16*f = -301 Respond with an integer.

Question 1 (Question id: q_rCt9):
Calculate -3 * -9.



Return a JSON with each question id (except for q_rCt9) as a key.

The value for each key should be an object that contains the answer in the field 'answer'.
Include an 'answer_type' field (value 'string' or 'integer') for every answer object.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
For string answers, include 'first_char' with the answer’s initial letter.
For last-character tasks, provide 'original_string' alongside the answer.

Beyond the question-id fields, add a 'global_metadata' object with summary information:
• num_questions_asked: how many questions were asked in total.
'num_questions_answered' must hold the number of answered questions.
• questions_with_integer_answers – list of question ids whose answers are integers (empty list if none).

Now provide the result JSON using the described format.

{"ground_truth": {"q_B8ttO": {"answer": 20, "answer_type": "integer", "half_answer": 10}, "global_metadata": {"num_questions_asked": 2, "num_questions_answered": 1, "questions_with_integer_answers": ["q_B8ttO"]}}}