Update README.md

README.md

@@ -1,4 +1,13 @@
-## KR3: Korean Restaurant Reviews with Ratings
+---
+language:
+- ko
+license: cc-by-nc-sa-4.0
+tags:
+- NLP
+- Sentiment Analysis
+---
+
+### KR3: Korean Restaurant Reviews with Ratings
 Korean sentiment classification dataset   
 
 - Size: 460K(+180K)
@@ -9,9 +18,9 @@ Korean sentiment classification dataset
 from datasets import load_dataset
 
 kr3 = load_dataset("Wittgensteinian/KR3", name='kr3', split='train')
+kr3 = kr3.remove_columns(['__index_level_0__']) # Original file didn't include this column. Suspect it's a hugging face issue.
 ```
 
-
 ### ⚠️ Caution with `Rating` Column
 0 stands for negative review, 1 stands for positive review, and 2 stands for ambiguous review.  
 **Note that rating 2 is not intended to be used directly for supervised learning(classification).** This data is included for additional pre-training purpose or other usage.  
@@ -21,6 +30,9 @@ In other words, this dataset is basically a **binary** sentiment classification
 See all the codes for crawling/preprocessing the dataset and experiments with KR3 in [Gitlab Repo](https://gitlab.com/Wittgensteinian/kr3).  
 See Kaggle dataset in [Kaggle Dataset](https://www.kaggle.com/ninetyninenewton/kr3-korean-restaurant-reviews-with-ratings).
 
+### License
+**CC BY-NC-SA 4.0**
+
 ### Legal Issues
 We concluded that the **non-commerical usage and release of KR3 fall into the range of fair use (공정 이용)** stated in the Korean copyright act (저작권법). We further clarify that we **did not agree to the terms of service** from any websites which might prohibit web crawling. In other words, web crawling we've done was proceeded without logging in to the website. Despite all of these, feel free to contact to any of the contributors if you notice any legal issues.