Sentence 1: The dog was barking at the front door. 
 Sentence 3: He snuck to the window and looked 
 Sentence 4:  The porch was empty 
 Sentence 5:  The dog just liked to bark at nothing 
 Option 1: A man was standing on the front porch and ran when he saw him. 
 Option 2: James wondered if someone was standing outside of it.