YOU SAID:
a cat ate a dog at the party of death
INTO JAPANESE
猫が死のパーティーで犬を食べた
BACK INTO ENGLISH
The cat ate the dog in party of death
INTO JAPANESE
猫の死のパーティーで犬を食べた
BACK INTO ENGLISH
Dog ate at the party for the death of a cat
INTO JAPANESE
犬は猫の死をパーティーで食べた
BACK INTO ENGLISH
Dog ate the cat's death at a party
INTO JAPANESE
犬は、パーティーで猫の死を食べた
BACK INTO ENGLISH
Dog ate the cat's death at a party
That didn't even make that much sense in English.