Feudalism characterized the social system of medieval Europe.

Changes in the social system inevitably occur with time.

This system is necessary to maintain social fairness.

The characteristic of this building is its unique design.

I am interested in the history of the Middle Ages.

This new system enables efficient business operations.

Feudalism dominated medieval European society.

We plan to hold the meeting in Western European Time.

We should take responsibility as part of society.

I plan to travel to Europe next year.