求GMAT阅读中某句话的翻译

题目

求GMAT阅读中某句话的翻译
Some scholars have argued that Garvey created the consciousness from which he built, in the 1920s, the largest revitalization movement in African American history.
这句话中是否是有两个consciousness,一个是新created consciousness,一个是he built的consciousness?这个in the 1920s和the largest...是修饰新created consciousness的吗?非常感谢!

答案

这句话里,in the 1920s 可以看做是一个插入语,语序可以调整为Some scholars have argued that Garvey created the consciousness （from which he built the largest revitalization movement in African American history）.
括号里的是一句从句,先行词为consciousness.
翻译过来就是说,一些学者认为Garvey唤起了人们的意识,在此意识之上他于19世纪20年代发起了美国黑人历史上规模最大的复兴运动.