He proposed a change of title for the book.

He proposed to change the title of the book.

I accidentally dropped the eye drops from the second floor.

Nikaido-san is my best friend.

The beluga whale lives in the Arctic Ocean.

The commander led the troops to the battlefield.

Let's go to see a movie together.

He lives on the 5th floor of the building.

My office is on the 5th floor of the building.

My apartment is five-storied.