YOU SAID:
my dad has black person disease
INTO JAPANESE
私の父は黒い人病
BACK INTO ENGLISH
My father is a black man's
INTO JAPANESE
私の父は黒人
BACK INTO ENGLISH
My father was black.
INTO JAPANESE
私の父は、黒だった。
BACK INTO ENGLISH
My father was black.
That didn't even make that much sense in English.