Four men wearing helmets are working on a road.
The men wore helmets while they worked on the road.
Two workers not wearing helmets are not working on a road.
They are no longer allowed to speak with one another.
A dog is ripping a woman's hand off viciously.
There is a couple posing for a picture.
A squirrel is applying eye liner.
They played volleyball when they were in college.
Helping to establish the principles of applying case studies to evaluation, is one of the things that this paper is intended to accomplish.