A man is skating down a set of stairs.
A skater using the stair
skater has no legs
A woman is walking with a baby in  stroller.
The kids are looking at books on the ground.
Thousands cheered for the marathon runners.
The boy is standing on the roof of his house.
A persistent moist cough for a minimum of 3 months a year, for several years in a row, can be a symptom of chronic bronchitis.
The synthetic dyes don't last as long or look as good as the natural ones.