A biography written by a person who did not personally know the subject
I don't think it is any or much less a sentence.
Answer:
The current changes taking place in Harlem Renaissance is described below in details.
Explanation:
The Harlem Renaissance started to appear amid an intelligent and social change that ultimately developed and expanded throughout the twentieth-century African American population. Something that occurred quickly after the North American Civil War that concluded up producing a black middle class, something that greatly praised the development of jobs and better learning for the descendant Africans.
Better technology that does not exist today. Maybe floating things or something?
Hope this work for you :)
Suppose
Here's a link to help you further
http://writingexplained.org/suppose-vs-supposed-difference