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_3LzdnT):
Find the value of b in the equation: 18*b - 21 = 105 Respond with an integer.

Question 1 (Question id: q_WhxmIBI):
How many times does the letter "l" appear in the text: "Dr Wilkins as"? Respond with an integer.

Question 2 (Question id: q_uMFe):
How many times does the letter "e" appear in the text: "Every one will"? Respond with an integer.

Question 3 (Question id: q_rovM):
Determine the value of u that satisfies: -19*u - 2 = -59 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.
Also add the answer type as 'string' or 'integer' to the field 'answer_type' for each object.
For even integer answers, include 'half_answer' equal to answer ÷ 2.
For last-character tasks, provide 'original_string' alongside the answer.

Now provide the result JSON using the described format.

{"ground_truth": {"q_3LzdnT": {"answer": 7, "answer_type": "integer"}, "q_WhxmIBI": {"answer": 1, "answer_type": "integer"}, "q_uMFe": {"answer": 3, "answer_type": "integer"}, "q_rovM": {"answer": 3, "answer_type": "integer"}}}