求分析一个英语复合句

问题描述:

求分析一个英语复合句
It turns out that the peculiar way of conducting the experiments may have led to misleading interpretation of what happened. 想问下后面那个of what happened 是属于介词短语做后置定语吗,如果是,那what 指代什么,做什么成分在句子中.of what happened 后面有省略吗

但是可以明确地说没有省略,what happened是名词性从句,就充当名词.happened是happen的过去式,不是过去分词.
interpretation of what happened对发生了什么的解释.