A brown dog persues a Frisbee across the grass as the thrower watches.
A dog plays in the park with his owner on a sunny day.
The day might not be sunny. The dog might not be in the park.
The person throwing the Frisbee is not necessarily the dogs owner.
Anybody could be throwing a Frisbee to this dog at almost any location and climate. it didn't have to be n the park with his owner on a sunny day.