YOU SAID:

there once was a mouse that lived in an air vent

INTO JAPANESE

かつてエア ・ ベントに住んでいたマウスがあった

BACK INTO ENGLISH

There was a mouse once lived in air vents

INTO JAPANESE

マウスがかつて住んでいた通気孔があった

BACK INTO ENGLISH

Had mice once lived vents

INTO JAPANESE

マウスはかつて住んでいた通気口

BACK INTO ENGLISH

Mouse is vent once lived.

INTO JAPANESE

マウスはベントがかつて住んでいた。

BACK INTO ENGLISH

Mouse events once lived.

INTO JAPANESE

マウス イベントがかつて住んでいた。

BACK INTO ENGLISH

Mouse events once lived.