YOU SAID:

she thought was the ocean; it's just a pool

INTO JAPANESE

彼女は海だと思った。それはただのプールです

BACK INTO ENGLISH

She thought it was the sea. It's just a pool

INTO JAPANESE

彼女はそれが海だと思った。それはただのプールです

BACK INTO ENGLISH

She thought it was the sea. It's just a pool