谁能帮我分析一下这个句子的语法结构啊？？？

Question

The fact that e-mail is the No. 1 online activity is concrete evidence that there's a huge number of people who feel likewise.

Answer 1

分析一下这个句子的语法结构

The fact 主语（定语从句that e-mail is the No. 1 online activity）is 谓语 

concrete evidence 表语（定语从句that there's a huge number of people （who feel likewise. who引导的句子修饰people 也是定从。相当于定语从句中宾语的定从））

收发电子邮件是最常见的在线活动，这一事实有力地佐证了很多人深有同感。