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_mvUul):
Calculate -9 + 5 + 9.

Question 1 (Question id: q_ZQuZ7):
Determine the value of f that satisfies: 14*f + 31 = 115 Respond with an integer.

Question 2 (Question id: q_w1fU5R8):
How many times does the letter "i" appear in the text: "Smith continues"? Respond with an integer.



Return a JSON with each question id as a key.

Each key’s value must be an object holding an 'answer' field.
Also add the answer type as 'string' or 'integer' to the field 'answer_type' for each object.
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.
If the response to a question is a string, add a 'first_char' field containing its first character.
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_mvUul": {"answer": 5, "answer_type": "integer"}, "q_ZQuZ7": {"answer": 6, "answer_type": "integer", "half_answer": 3}, "q_w1fU5R8": {"answer": 2, "answer_type": "integer", "half_answer": 1}}}