Update README: correct metadata.jsonl structure with file_name field

README.md

@@ -79,16 +79,16 @@ MWS-Vision-Bench/
 
 ## 📋 Data Format
 
-Each entry in `metadata.jsonl` follows this structure:
+Each line in `metadata.jsonl` contains one JSON object:
 
 ```python
 {
+  "file_name": "images/image_0.jpg",   # Path to the image
   "id": "1",                           # Unique identifier
   "type": "text grounding ru",         # Task type
   "dataset_name": "business",          # Subdataset name
-  "image_path": "/business/scans/...", # Path to the image
   "question": "...",                   # Question in Russian
-  "answers": [...]                     # List of valid answers
+  "answers": ["398", "65", ...]        # List of valid answers (as strings)
 }
 ```