A group of people , one holding a yellow and blue umbrella , are standing at the top of some stairs .
There is little chance that a group of co-workers wait at the top of the stairs , all huddled under one person 's umbrella .
There is little chance that a group of co-workers wait at the top of the stairs , all huddled under one person 's umbrella .
It is almost certain that a group of co-workers wait at the top of the stairs , all huddled under one person 's umbrella .
A group of co-workers wait at the top of the stairs , all huddled under one person 's umbrella .