Category theory is a branch of mathematics that studies structures and their relationships.

When I saw his performance for the first time, I was moved by his talent.

He is opposed to an authoritarian government.

He is a famous licensed architect who has designed many wonderful buildings.

There is still an old ticket machine left at the station.

He started a new life as a former prosecutor.

He is the driving force behind this project.

My dog loves his new kennel.

This device can detect abnormalities at an early stage.

This sensor can detect abnormalities at an early stage.