def construct_return_statement(prediction, dog_detection, human_detection):
    """Construct a str return statement from predicted breed and results of dog/human detector."""
    if dog_detection:
        return 'This is a {}.'.format(prediction)
    elif human_detection:
        return 'This human looks like a {}.'.format(prediction)
    else:
        return 'No human (frontal-face) or dog detected in image.'