A person is standing on top of a rock in the middle of a small stream surrounded by natural green trees.
A person is on a rock, surrounded by trees
A man is on top of an oak tree.
Case studies don't compare people that have different treatments.
People are gathering outside.
The worker was in a field planting flowers.
I've never heard of them.
These hosses are good and will be treated well.
A skateboarder does tricks while his friend takes pictures.