A group of people work on the side of a large metal structure that is very blue on a cloudy day .
It is highly likely that some workers are on the side of a large metal structure that is very blue on a cloudy day .
It is highly likely that some workers are on the side of a large metal structure that is very blue on a cloudy day .
Chances are slight that some workers are on the side of a large metal structure that is very blue on a cloudy day .
Some workers are on the side of a large metal structure that is very blue on a cloudy day .