A competitor does a pole vault.
An athlete competes in the pole vaulting event.
This man is training for hurdles.
The comparisons would not be so simple if the two subclasses were given different proportionate markups.
The man is on the ground.
A man is playing instruments on the street
A baseball player makes a defenisve move
The man in a blue shirt is playing piano.
People are sitting or laying on a hill.