YOU SAID:
I gotta go see a man about a horse
INTO JAPANESE
私は馬について男に会いに行かなければならない
BACK INTO ENGLISH
I have to go see a man about a horse
INTO JAPANESE
私は馬について男に会いに行かなければならない
BACK INTO ENGLISH
I have to go see a man about a horse
That didn't even make that much sense in English.