A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. A muzzled greyhound leaps over grassy ground. The greyhound is running through the building. A crowd of people forms across the city street filled with traffic. The man sat alone on his front porch watching the street with no one on it. Three dogs are sniffing each other. Can we conclude that nothing is sniffing?
yes
no
no
no