哪位牛人帮忙分析一下下面的句子结构?谢谢了.那两个which指代那个词?

全句的主干是each of us shares with the community .意思是“我们每个成员都与集体共同分享”.
——这是句子的第一层.
in which we live a store of words and meanings as well as agreed conventions as to the way in which words should be arranged to convey a particular message是一个复杂的定语从句,其主干是we live a store of words and meanings as well as agreed conventions,意思是“我们不仅以约定俗成的惯例方式存在,而且以词库和意义库存的形式存在”.
句首的in which指代先行词the community,在从句里作地点状语,可以换成where.
——这是句子的第二层.
在这个定语从句中,as to the way in which words should be arranged to convey a particular message作定语,修饰agreed conventions.
——这是句子的第三层.
in which words should be arranged to convey a particular message又是一个定语从句.in which指代the way,在从句里作方式状语,可以换成that.
——这是句子的第四层.
句意：我们当中每个成员都与我们的集体共存（这里share含有共存的意思）.在这个集体中,我们不仅以约定俗成的常规形式存在,还以词库存和意义库的形式存在.至于约定俗成的常规形式,是指词（按一定规则）排列组合起来以表达特定的意义.