He used to be a member of the Chinese gang.

He experienced the harsh reality of the underbelly of society.

His sociability is an important factor for his success as a leader.

He is deeply interested in social issues.

He deeply believes in the principles of socialism.

Maintaining social order is the responsibility of all of us.

He understands his responsibilities as a working adult.

After graduating from university, you have to prepare to enter the real world.

My child attends a supplementary school every Saturday.

Natural language understanding is an important field of artificial intelligence.