people who work in the country are often attracted .请问这句话的含义

people who work in the country are often attracted .请问这句话的含义,
不好意思，刚才漏下了。people who work in the country are often attracted by what seem to them the advantage of living in a city.
请帮我分析一下这句话的结构，

工作在农村的 人 常 被 似乎对他们来说来所谓的居住在城市的优点 所吸引.
who work in the country是 people的定语
主要结构是 sb are attracted by sth
what seem to them the advantage of living in a city是一个名词性从句
相当于一个名词sth
what 在这个从句中做主语 sth（A） seem sth（B） to sb A对某人来说是B
此处what指代A 而B是the advantage of living in a city