The separation of powers is one of the basic principles of democracy.

The greater part of the time is spent on work.

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

His father was diagnosed with schizophrenia in the past.

He was diagnosed with schizophrenia.

The meristem of this plant is very active.

Molecular biology is a field of study that understands life phenomena at the molecular level.

He is known as an expert in psychoanalysis.

Where is his place of origin?

Where is his songbun from?