Kishiko is my best friend.

In linguistics, a signifier is considered a symbol used to convey meaning.

Sueki is my best friend.

The abovementioned item has already sold out.

His travelogue was very interesting, and I finished reading it in one go.

He is good at reciting ancient poems from memory.

He recited an old poem from memory.

Reading his biography, you can understand how difficult his life was.

This old document uses a lot of symbols.

Mr. Takaki is my best friend.