A group of people are standing on mats while taking an exercise class in a carpeted room .
A group of people running a marathon to the finish .
A group of people are standing on mats while taking an exercise class in a carpeted room.
A group of people running a marathon to the finish.
The people cannot be standing on mats and running a marathon at the same time.
The people can not be standing on mats and running a marathon at the same time .