A lady is in a wheelchair on the corner of a street , and a man in a white shirt is about to cross the street .
There is a better than even chance that a man in a white shirt crosses the street while a lady in a wheelchair waits for the signal before crossing .
There is a better than even chance that a man in a white shirt crosses the street while a lady in a wheelchair waits for the signal before crossing .
It is improbable that a man in a white shirt crosses the street while a lady in a wheelchair waits for the signal before crossing .
A man in a white shirt crosses the street while a lady in a wheelchair waits for the signal before crossing .