He is participating in the anti-war movement.

He told me the whole story of the incident.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

He made a model of a triangular prism.

He made a lamp in the shape of a hexagonal prism.

He understands the importance of learning.

He is majoring in psychology.

Gaku is my best friend.

He has a deep interest in archaeology.