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_7hG9Z):
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: "that"

Question 1 (Question id: q_IZ6W8E):
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: "think"

Question 2 (Question id: q_oAC9pK3g):
Calculate ( 2 - -7 ).



Output JSON where all question ids are keys, omitting q_7hG9Z.

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.
If the response to a question is a string, add a 'first_char' field containing its first character.
For last-character tasks, provide 'original_string' alongside the answer.

Now provide the result JSON using the described format.

{"ground_truth": {"q_oAC9pK3g": {"answer": 9, "answer_type": "integer"}, "q_IZ6W8E": {"answer": "k", "answer_type": "string", "first_char": "k", "original_string": "think"}}}