YOU SAID:
john was a farmer, who ate a lot of potatoes
INTO JAPANESE
ジョンは農夫に多くのポテトを食べた
BACK INTO ENGLISH
John had many Potato farmers
INTO JAPANESE
ジョンは多くのジャガイモ農家をしていた
BACK INTO ENGLISH
John had many Potato farmers
Come on, you can do better than that.