YOU SAID:
mr stern and homer had a child
INTO JAPANESE
スターン氏とホーマーには子供がいた
BACK INTO ENGLISH
Mr. Stern and Homer had children.
INTO JAPANESE
スターン氏とホーマーには子供がいた。
BACK INTO ENGLISH
Mr. Stern and Homer had children.
That didn't even make that much sense in English.