First edit on the dataset card

README.md

@@ -27,3 +27,62 @@ configs:
   - split: test
     path: data/test-*
 ---
+# Dataset Summary
+I have uploaded previously a dataset similar to this one, and that's why
+this one is named with the suffix `_v2`. In this dataset card, we shall refer to
+the previous dataset by the name of **v1**.
+
+This v2 version attempts to fix the following issues:
+
+- There were simply too many images in v1 for any model to properly run through even a single epoch.
+    - Consequently, maybe by bad luck, someone may train on images that do not cover all the symbols.
+- v1 seems to lack of CAPTCHA images with repeated symbols, e.g. `"jj12oj"`.
+
+The usage and meaning of the current v2 dataset should be intuitive (and quite independent of v1):
+
+```ipython
+In [1]: from datasets import load_dataset
+
+In [2]: dataset = load_dataset("phunc20/nj_biergarten_captcha_v2)
+README.md: 100%|█████████████████████████████████████████████████████████████████████████████████████████| 533/533 [00:00<00:00, 1.58MB/s]
+train-00000-of-00001.parquet: 100%|██████████████████████████████████████████████████████████████████| 36.3M/36.3M [00:07<00:00, 2.02MB/s]
+validation-00000-of-00001.parquet: 100%|███████████████████████████████████████████████████████████████| 541k/541k [00:00<00:00, 2.06MB/s]
+test-00000-of-00001.parquet: 100%|█████████████████████████████████████████████████████████████████████| 931k/931k [00:00<00:00, 2.04MB/s]
+Generating train split: 100%|████████████████████████████████████████████████████████████| 20000/20000 [00:00<00:00, 113382.55 examples/s]
+Generating validation split: 100%|████████████████████████████████████████████████████████████| 300/300 [00:00<00:00, 45083.88 examples/s]
+Generating test split: 100%|██████████████████████████████████████████████████████████████████| 500/500 [00:00<00:00, 92186.56 examples/s]
+
+In [3]: dataset
+Out[3]:
+DatasetDict({
+    train: Dataset({
+        features: ['image', 'label'],
+        num_rows: 20000
+    })
+    validation: Dataset({
+        features: ['image', 'label'],
+        num_rows: 300
+    })
+    test: Dataset({
+        features: ['image', 'label'],
+        num_rows: 500
+    })
+})
+
+In [4]: dataset["test"][0]["label"]
+Out[4]: '9ymyht'
+
+In [5]: dataset["test"][0]["image"]
+Out[5]: <PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=140x50>
+```
+
+
+# Citation Information
+
+```
+@ONLINE{nj_biergarten_captcha_v2,
+    author = "phunc20",
+    title  = "nj_biergarten_captcha_v2",
+    url    = "https://huggingface.co/datasets/phunc20/nj_biergarten_captcha_v2"
+}
+```