there is a belief that true friends are people who have had similar life experiences that引导什么句引导什么句子?

there is a belief that true friends are people who have had similar life experiences that引导什么句引导什么句子?
there is a belief that true friends are people who have had similar life experiences that引导什么句
引导什么句子?

there is a belief that true friends are people who have had similar life experiences that引导什么句引导什么句子?
引导同位语从句,解释前面所提到的belief .
that在从句中不作任何成分
后面的从句时一个完整的句子.

that引导同位语从句，后面who引导定语从句