A group of people sitting on benches at a city park .
Chances are about even that a group of people are sitting on a park bench listening to a street violinist .
It is impossible that a group of people are sitting on a park bench listening to a street violinist .
Chances are about even that a group of people are sitting on a park bench listening to a street violinist .
A group of people are sitting on a park bench listening to a street violinist .