A large amount of smoke and ash was spewing from the volcano.

The fire truck went into action because of the fire.

He has completed the entry and exit procedures.

An exhibitionist was arrested in the park.

The calculus of variations is a branch of mathematics that deals with the optimization of functions.

He is studying at law school.

The fire alarm went off, so we immediately evacuated the building.

A tsunami warning has been issued, so please evacuate immediately.

This restaurant has an all-you-can-eat sushi.

A visitor has come.