This one Ethiopian guy came to NY and the only English phrases he knew was "who owns this" and "who is this" One day he was walking down town new york and he asked this lady walking by who owns this building (skyscraper)and she said "I don't know".
He went to a restaurant and asked "who owns this"? and the man said " I don't know"
He went home and told his family that today, he came to know the richest man in NY and his name is " I don't know" The next morning he wakes up and sees this accident near his house. He rushed to the place like he was the fire fighter or something and asked "who is this"? someone replied; "I don't know" he was shocked and told his family that the richest man, " aka I don't know" died in a car accident.
