Question

帮我分析一下这是什么从句，OF WHICH在从句中是什么成分

帮我分析一下这是什么从句，OF WHICH在从句中是什么成分The problem is an unexpected outbreak of infectious disease,of which the first indication is likely to be sick people in emergency rooms or clinics.

Answer 1

逗号后面是一个非限制性定语从句修饰disease，of是和indication连用的，就是the first indication of which（which代指disease）是...