A man and woman walking across a street next to a mural of a man giving a woman a golden apple.
A man and a woman are outside.
A man and a woman sit in an auditorium listening to a speech.
A person is running.
Two days passed before I was able to help the calf.
SO2 emissions requirements are set.
Two men watch TV.
This analysis assumes that the C-R function has a non-linear form.
A boy is in the ocean.