Monarchy still exists in some countries.

He likes to take a walk in the park at dusk.

He engaged in an extravehicular activity from the spaceship.

He is undergoing training for extravehicular activity.

Well then, I'm off.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

Her family adopts a matriarchy.

The United Kingdom is a constitutional monarchy.

Oligarchy is a political system where a few powerful people rule the country.

Proportional representation is an important system to ensure the fairness of elections.