YOU SAID:

I ate someones food from their secure lunch box

INTO JAPANESE

私は誰かの安全な弁当箱から食べ物を食べました

BACK INTO ENGLISH

I ate food from someone's safe lunch box

INTO JAPANESE

誰かの安全な弁当の食べ物を食べた

BACK INTO ENGLISH

I ate food from someone else's safe lunch box.

INTO JAPANESE

他人の安全なお弁当の食べ物を食べてしまいました。

BACK INTO ENGLISH

I ate food from someone else's safe lunch box.