YOU SAID:
The dog ate the poor duck in the circus
INTO JAPANESE
犬はサーカスのかわいそうなアヒルを食べた
BACK INTO ENGLISH
The dog ate the poor duck at the circus
INTO JAPANESE
犬はサーカスでかわいそうなアヒルを食べた
BACK INTO ENGLISH
The dog ate the poor duck at the circus
That didn't even make that much sense in English.