YOU SAID:

the unknown: exist. me: I've never heard of it.

INTO JAPANESE

未知：存在する。私：聞いたことがないです。

BACK INTO ENGLISH

Unknown: Exists. Me: I've never heard of it.

INTO JAPANESE

不明: 存在します。私：聞いたことがないです。

BACK INTO ENGLISH

Unknown: Exists. Me: I've never heard of it.