问题描述：
请判断下列句子是宾语从句还是定语从句,若是定语从句,标明先行词和关系代词,并指出关系代词的成分.
I only knew he was stud5ng in a western country,but I didn't now what country he was in.
2.The person you wish to see has come.
3.he is the man holdng a gun.
4.The Great Wall built by ancient Chinese is amazing,isn't it?
I only knew he was stud5ng in a western country,but I didn't now what country he was in.
2.The person you wish to see has come.
3.he is the man holdng a gun.
4.The Great Wall built by ancient Chinese is amazing,isn't it?
问题解答：
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