如何看出一句长的英语句子中的主语 谓语 宾语 有例子 可以将例子分析

As in other parts of movie making | there are those || who have developed particular skill in creating certain kinds of effects.
分两层理解，第一层as引导非限制性定语从句，有“如，似，正像”的含义
第二层为关系代词who引导的限制性定语从句