YOU SAID:
sally saw a seashell by the sea shore
INTO JAPANESE
サリーは海岸のそばで貝殻を見た
BACK INTO ENGLISH
Sally saw a shell by the shore.
INTO JAPANESE
サリーは岸のそばで貝殻を見た。
BACK INTO ENGLISH
Sally saw a shell by the shore.
That didn't even make that much sense in English.