Short history paper about modern architecture ( 1 Page )

In less than 500 words answer the following question:

--Considering the two articles, the Frank Lloyd Wright films, and the PPT slides, how do we define modern architecture and its sources? 

The film: 

 - https://www.dailymotion.com/video/x6wxux3 

-  https://www.dailymotion.com/video/x6wxux2 

the article and the powerpoint slides are in the attachment. 

it's due April 9 2020