A group of people work on the side of a large metal structure that is very blue on a cloudy day .
Chances are about even that a group of people make repairs to a metal structure before returning home for the day .
Chances are about even that a group of people make repairs to a metal structure before returning home for the day .
It is impossible that a group of people make repairs to a metal structure before returning home for the day .
A group of people make repairs to a metal structure before returning home for the day .