Update README.md

README.md

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----
-license: cc-by-sa-4.0
----
+---
+license: cc-by-sa-4.0
+---
+---
+pretty_name: Math StackExchange Curated (Parquet, CC BY-SA 4.0)
+dataset_type: text
+license: cc-by-sa-4.0
+language:
+- en
+tags:
+- math
+- question-answering
+- reasoning
+- stackexchange
+- cc-by-sa
+- parquet
+task_categories:
+- question-answering
+task_ids:
+- open-domain-qa
+- abstractive-qa
+configs:
+- config_name: default
+  data_files:
+    train: math_stackexchange_train.parquet
+    validation: math_stackexchange_val.parquet
+    test: math_stackexchange_test.parquet
+---
+
+# Math StackExchange Curated (Parquet, CC BY-SA 4.0)
+
+This dataset is a curated collection of Math StackExchange (MSE) Q&A pairs packaged in **Parquet** format for efficient loading and training.  
+Each example contains a problem statement (`title`, `question_body`), a corresponding community answer (`answer_body`), a tag string (`tags`), and an indicator of whether the answer is the accepted solution (`accepted`).
+
+> **Source & License**  
+> Content is derived from the **Stack Exchange Data Dump** for **Math StackExchange** (CC BY-SA 4.0, © Stack Exchange Inc.).  
+> This derived dataset is released under **CC BY-SA 4.0** to comply with the share-alike terms.  
+> Please attribute Math StackExchange and Stack Exchange Inc. when using this dataset.
+
+---
+
+## Splits & Files
+
+- `math_stackexchange_train.parquet`
+- `math_stackexchange_val.parquet`
+- `math_stackexchange_test.parquet`
+
+> All files are columnar **Parquet** for fast streaming and low storage overhead.
+
+---
+
+## Schema
+
+| field          | dtype  | description |
+|----------------|--------|-------------|
+| `title`        | string | Thread title (short problem description). |
+| `question_body`| string | Full post body of the question (often includes LaTeX/MathJax). |
+| `answer_body`  | string | Answer text (the primary answer included in this dataset). |
+| `tags`         | string | Pipe-delimited MSE tags, e.g. `\|number-theory\|elementary-number-theory\|`. |
+| `accepted`     | int64  | `1` if the included answer is the accepted solution, otherwise `0`. |
+
+> **Note on `tags`:** tags come as a single string with leading/trailing pipes. See the snippet below to normalize them into a Python list.
+
+---
+
+## Example
+
+```json
+{
+  "title": "Numbers are too large to show $65^{64}+64^{65}$ is not a prime",
+  "question_body": "I tried to find cycles of powers, but they are too big. Also $65^{n} \\equiv 1(\\text{mod}64)$, so I dont know how to use that.",
+  "answer_body": "Hint ... x^4 + 64 y^4 = (x^2+8y^2)^2 - (4xy)^2 = ... [factorizations and references] ...",
+  "tags": "|elementary-number-theory|",
+  "accepted": 0
+}