You are a dental research assistant. Your task is to extract ALL content related to "gingival sulcus" (also called "gingival crevice", "sulcular epithelium", "crevicular fluid", "sulcus depth", "probing depth", "junctional epithelium", "crevicular epithelium", "gingival pocket", "sulcular fluid") from the following uploaded reference files. Read each file carefully and extract every relevant passage, definition, description, or clinical note. Organize your output by book title. Files to read: 1. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/14 th ed Newman_and_Carranza's_Clinical_Periodontology_and_Implantology, - Copy.txt 2. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Carranza's Clinical Periodontology, 10th Edition - Copy.txt 3. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Clinical Periodontology and Implant Dentistry 6th Edition - Copy.txt 4. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Essentials of_Clinical Periodontology and Periodontics.md 5. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Fundamentals of Periodontology.md 6. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Orban's Oral Histology & Embryology.txt 7. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Periodontics Medicine Surgery Implants.txt 8. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Periodontology for The Dental Hygienist .txt 9. /home/daytona/workspace/attachments/b75951c5-5b50-4baf-b1ed-efa4433f845b/Pharmacology and Therapeutics for Dentistry.txt Instructions: - Use read_file with limit=200 at a time, paginating through each file as needed (use offset=0, then 200, 400, 600, etc.) - Search for keywords: gingival sulcus, sulcular epithelium, crevicular fluid (GCF), sulcus depth, junctional epithelium, sulcular/crevicular, probing depth, gingival crevice, sulcus fluid - For each file, extract the most relevant paragraphs and sentences verbatim or closely paraphrased - Include page numbers or section headings if visible in the text - Return a comprehensive organized report of all extracted content, grouped by book title - Be thorough - this is for postgraduate exam preparation