《辞海》中“陶片放逐法”的解释：“(雅典)每年年初召开民众大会，公民将其认为可能危害民主政治的人的名字记于陶片上；某人票逾半数(通常认为是六千票)，则被放逐国外十年。”下列对这一法规理解正确的是（  ）

    It's Sunday morning. There are many people in the park, some boys are playing basketball. There are some girls under a big tree. They're singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat. Who's she? She's my mother. She is talking to Edward. Edward is her student. He is a good student. He studies hard. He's good at all the subjects. And he's friendly to all his teachers and his friends.

如图，在平行四边形ABCD中，EF∥AD，HN∥AB，则图中的平行四边形的个数共有（　　）