[观察例句]
观察下列句子，并指出定语从句的类型。
1．I speak with the onduty nurse，who tells me that Lara's parents rushed her to the hospital... 非限制性定语从句
2．Scientific studies show that laughter produces chemicals to make people feel better，which means clown doctors can be helpful.
非限制性定语从句
3．A person with his head in the clouds is a dreamer，whose mind is not in the real world. 非限制性定语从句
4．Qingdao is a beautiful city，where I'll pay a sixday visit.
非限制性定语从句
5．People sit uncomfortably on plastic chairs，looking through old magazines，all of which have been read hundreds of times previously.
非限制性定语从句
6．In the middle of this particular scene I spot a small girl whose ankle is twice its normal size. 限制性定语从句
7．The last time I went to Scotland was in May，when the weather was beautiful. 非限制性定语从句
