YOU SAID:
Sally searched for seashells by the seashore
INTO JAPANESE
サリーは海岸で貝殻を探しました
BACK INTO ENGLISH
Sally searched for seashells on the beach
INTO JAPANESE
サリーはビーチで貝殻を探しました
BACK INTO ENGLISH
Sally searched for seashells on the beach
That didn't even make that much sense in English.