My grandfather was born in the 1900's.

Abstract algebra is a field of mathematics that studies algebraic structures in an abstract way.

I am studying Modern English.

The Cultural Revolution is a part of China's history.

Rui loves baseball.

The Third International was a historically important organization.

The Mesolithic is the era between the Paleolithic and the Neolithic.

I studied linear algebra at university.

He continues to practice in search of complete enlightenment.

Under the big tree, he was reading a book.