YOU SAID:
Grandma got runner by a reindeer
INTO JAPANESE
おばあちゃんはトナカイによってランナーになった
BACK INTO ENGLISH
Grandma became runner by reindeer
INTO JAPANESE
おばあちゃんはトナカイによってランナーになりました
BACK INTO ENGLISH
Grandma became runner by reindeer
That didn't even make that much sense in English.