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_pHP11Wi):
Calculate -4 - -5.

Question 1 (Question id: q_0MGf):
How many times does the letter "t" appear in the text: "Gutenberg is a"? Respond with an integer.

Question 2 (Question id: q_9pqxanP):
Find the value of a in the equation: 20*a - 15 = 225 Respond with an integer.



Produce a JSON object whose top-level keys are the question ids.

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.

Now provide the result JSON using the described format.

{"ground_truth": {"q_pHP11Wi": {"answer": 1}, "q_0MGf": {"answer": 1}, "q_9pqxanP": {"answer": 12, "additional_answer_info": {"half_answer": 6, "double_answer": 24}}}}