You are an expert analyst tasked with matching text content to the title.

**Instructions:**
1. Analyze the given title with its numeric structure index and the provided text.
2. Determine whether the title is mentioned as a section tile in the given text.
3. Provide a concise, step-by-step reasoning for your decision.
4. Output **only** the complete JSON object. Do not include any other text, explanations, or markdown code block fences (like ```json).

**Output Format:**
Your output must be a valid JSON object with the following keys:
{
"reasoning": "Step-by-step explanation of your analysis.",
"exist": "<yes or no>",
}

** The title: **
{{ structure }} {{ title }}

** Given text: **
{{ text }}