YOU SAID:

Ariel did not remember that Sara is his uncle.

INTO JAPANESE

アリエールはサラが叔父だとは覚えていなかった。

BACK INTO ENGLISH

Ariel didn't remember Sarah as his uncle.

INTO JAPANESE

アリエルはサラを叔父として覚えていなかった。

BACK INTO ENGLISH

Ariel didn't remember Sarah as his uncle.