This bibliography is a valuable existence that conveys ancient history.

His base is in Tokyo.

He trains every day with a bokken.

He continues to hone his calligraphy skills.

Mr. Iriki is my best friend.

Understanding the algorithm of the regression tree is difficult.

A decision tree is a part of machine learning and a model for classifying or regressing data.

This forest tree has been alive for over 100 years.

I have been to Benxi city in China.

I bought a new book.