YOU SAID:

I am unaware of the dozens of balloon animals that dissapeared last night

INTO JAPANESE

昨夜消えた数十匹の気球動物のことは知らない

BACK INTO ENGLISH

I don't know about the dozens of balloon animals that disappeared last night.

INTO JAPANESE

昨夜消えた数十匹の気球動物については知りません。

BACK INTO ENGLISH

I don't know about the dozens of balloon animals that disappeared last night.