YOU SAID:

the cat ate he fish that ate the dog that ate a unicorn

INTO JAPANESE

猫は魚を食べ、犬はユニコーンを食べた

BACK INTO ENGLISH

The cat ate the fish and the dog ate the unicorn

INTO JAPANESE

猫は魚を食べ、犬はユニコーンを食べました

BACK INTO ENGLISH

The cat ate the fish and the dog ate the unicorn