diff --git a/.gitignore b/.gitignore
index 14e4cfa..ab7c8cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,8 @@ ch05/01_main-chapter-code/model.pth
 ch05/01_main-chapter-code/model_and_optimizer.pth
 ch05/03_bonus_pretraining_on_gutenberg/model_checkpoints
 ch06/01_main-chapter-code/gpt2
+ch06/02_bonus_additional-experiments/gpt2
+ch06/03_bonus_imdb-classification/gpt2
 
 # Datasets
 ch02/01_main-chapter-code/number-data.txt
@@ -26,6 +28,11 @@ ch06/01_main-chapter-code/sms_spam_collection
 ch06/01_main-chapter-code/test.csv
 ch06/01_main-chapter-code/train.csv
 ch06/01_main-chapter-code/validation.csv
+ch06/02_bonus_additional-experiments/test.csv
+ch06/02_bonus_additional-experiments/train.csv
+ch06/02_bonus_additional-experiments/validation.csv
+ch06/02_bonus_additional-experiments/sms_spam_collection.zip
+ch06/02_bonus_additional-experiments/sms_spam_collection
 ch06/03_bonus_imdb-classification/aclImdb/
 ch06/03_bonus_imdb-classification/aclImdb_v1.tar.gz
 ch06/03_bonus_imdb-classification/test.csv
diff --git a/ch06/03_bonus_imdb-classification/README.md b/ch06/03_bonus_imdb-classification/README.md
index e827617..ede1721 100644
--- a/ch06/03_bonus_imdb-classification/README.md
+++ b/ch06/03_bonus_imdb-classification/README.md
@@ -17,7 +17,7 @@ The codes are using the 50k movie reviews from IMDb ([dataset source](https://ai
 Run the following code to create the `train.csv`, `val.csv`, and `test.csv` datasets:
 
 ```bash
-download-prepare-dataset.py
+python download-prepare-dataset.py
 ```