Update README.md

README.md

@@ -62,9 +62,19 @@ Example (truncated):
 }
 ```
 
-MOMIJI contains the data fields listed above. Please use the **[momiji_generator](https://github.com/turingmotors/momiji_generator)** utility to populate the text and text_list fields.
+Each sample has three top-level fields:
+
+| Field        | Type              | Description                                                                                                   |
+|--------------|-------------------|---------------------------------------------------------------------------------------------------------------|
+| `docId`      | `str`               | Unique ID derived from the source Common Crawl ID                                                             |
+| `url`        | `str`               | Source web URL                                                                                                |                                            |
+| `image_info` | `list\<dict\>`      | List of image metadata:<br>• `placeholder` (str)<br>• `url` (str)<br>• `original_width` / `original_height` (int)<br>• `exif` (dict, optional)<br>• `alt` (str, optional) |
 
 
+MOMIJI contains the data fields listed above. Please use the **[momiji_generator](https://github.com/turingmotors/momiji_generator)** utility to populate the text and text_list fields. See the  section below for an example record generated by momiji_generator, showing the populated `text` and `text_list` fields.
+
+<details>
+
 Example (truncated):
 
 ```json
@@ -108,9 +118,13 @@ Each sample has five top-level fields:
 | `text`       | `str`               | Full text with image placeholders                                                                             |
 | `image_info` | `list\<dict\>`      | List of image metadata:<br>• `placeholder` (str)<br>• `url` (str)<br>• `original_width` / `original_height` (int)<br>• `exif` (dict, optional)<br>• `alt` (str, optional) |
 
+</details>
+
+
+
 ## Size and Splits
 
-MOMIJI contains about **56M** Japanese web documents. Because images are provided only as URLs (no binary data), the dataset is roughly **150 GB**.
+MOMIJI contains about **56M** Japanese web documents. Because images are provided only as URLs (no binary data), the dataset is roughly **14.7 GB**.
 
 ## MOMIJI Statistics