John is one of those rare people who belives in ancient myth.定语从句分析

问题描述:

John is one of those rare people who belives in ancient myth.定语从句分析
①John is one of those rare people who belives in ancient myth这个句子里面,定语从句修修饰的先行词是哪个?people还是John?为什么?要详解,
②He is one of the boys who enjoy playing basketball和He is the only one of the boys who enjoys playing basketball这两个句子里面为什么第一个定语从句修饰the boys,第二个修饰he?
这个是one of...和the one of ...的区别麽?还是是因为only这个单词?请详解,
(回答周全的可额外要分,)

1 是one,因为后面用believes
2 第一个修饰boys,第二有only,就用单数