update README: fix collision count (826), add realworld schema, split schema tables

README.md

@@ -28,7 +28,7 @@ configs:
 
 ## Dataset Structure
 
-Each subset shares the same schema:
+### Synthetic subsets (`collision`, `compatibility`, `occlusion`, `physics`)
 
 | Field | Type | Description |
 |---|---|---|
@@ -38,9 +38,20 @@ Each subset shares the same schema:
 | `image` | image | Rendered scene image |
 | `not_sure` | string | Option label corresponding to "Not sure" |
 
+### Real-world subset (`realworld`)
+
+| Field | Type | Description |
+|---|---|---|
+| `id` | string | Unique sample identifier |
+| `type` | string | Question category (collision / occlusion / compatibility / trajectory) |
+| `question` | string | Multiple-choice question |
+| `options` | list[string] | Answer choices (e.g. `["Yes", "No"]`) |
+| `answer` | string | Correct answer text |
+| `image` | image | Real-world scene photo |
+
 ## Subsets
 
-### `collision` — 413 samples
+### `collision` — 826 samples
 A toy car is placed on a floor with objects nearby. The model must judge whether the car will collide with something if it moves forward, and if so, which object to remove to prevent the collision.
 
 > *Note: Floor strip spacing encodes depth perspective.*
@@ -60,20 +71,17 @@ Ball trajectory prediction across three sports scenarios:
 - **Billiard**: Will a ball reach a pocket given the cue ball's direction?
 
 ### `realworld` — 116 samples
-Real-world driving and street scene photographs. The model must reason about physical outcomes in real images across four question types:
+Real-world driving and street scene photographs. The model must reason about physical outcomes across four question types:
 - **collision**: Will a moving vehicle collide with another object?
 - **occlusion**: Will an object be occluded given a movement?
 - **compatibility**: Can an object fit into or pass through a space?
 - **trajectory**: What trajectory will a moving object follow?
 
-Each sample has an `options` field (list of answer choices) and a `type` field indicating the question category.
-
 ## Usage
 
 ```python
 from datasets import load_dataset
 
-# Load a specific subset
 ds = load_dataset("Mwxinnn/CausalSpatial", name="collision")
 ds = load_dataset("Mwxinnn/CausalSpatial", name="physics")
 ds = load_dataset("Mwxinnn/CausalSpatial", name="compatibility")