Teacher: Here are two birds, one is a swallow, the other is sparrow. Now who can tell us which is which?
Student: I cannot point out but I know the answer.
Teacher: Please tell us.
Student: The swallow is beside the sparrow and the sparrow is beside the swallow.
Student: I cannot point out but I know the answer.
Teacher: Please tell us.
Student: The swallow is beside the sparrow and the sparrow is beside the swallow.
