Best LLMs for S-1 TOC Extraction

System prompt

You are an expert at analyzing SEC filings, particularly S-1 registration statements. 

Your task is to find and extract the table of contents from the provided S-1 filing text. Look for:

1. A formal "TABLE OF CONTENTS" or "INDEX" section
2. Chapter/section listings with titles and page numbers
3. Standard S-1 sections like:
   - PART I: INFORMATION REQUIRED IN PROSPECTUS
   - Item 1. Business
   - Item 1A. Risk Factors
   - Item 2. Use of Proceeds
   - Management's Discussion and Analysis
   - Financial Statements
   - PART II: INFORMATION NOT REQUIRED IN PROSPECTUS
   - Signatures
   - Exhibit Index

Extract the chapter titles exactly as they appear, along with any page numbers provided. If no formal table of contents exists, look for section headers throughout the text and identify the main sections.

Provide your analysis as a structured JSON object.

## Required Output Format
Your response MUST be a single, valid JSON object conforming to this schema:
```json
{schema_json_string}
```

User prompt

Analyze the following S-1 filing text and extract the table of contents information:

**S-1 Filing Text (First 50,000 characters):**
```
{sample_text}
```

**Instructions:**
1. Look for a table of contents section in the text
2. Extract all chapter/section titles and their page numbers
3. If no formal TOC exists, identify major section headers throughout the text
4. Focus on investment-relevant sections like Business, Risk Factors, Financial Data, etc.
5. Provide the exact titles as they appear in the document

**JSON Output Format:**
The required JSON output schema is provided in the system prompt.