A dog with a ball in his mouth running down a road covered in leaves.
A dog running down a leaf covered road carrying a ball in it's mouth
A dog who is running could be running with a ball in his mouth.  When a dog is running down the road the road could be covered in leaves.  Both are saying the same thing but in a different order.
If the road the dog is on is covered in leaves, it is a leaf covered road.
The second sentence is a rephrasing of the first sentence, even using the same words: dog, ball, road and leaves.