Question: What classification of film is shared by 'An American Opera', which chronicles events following Hurricane Katrina and 'Fear of a Black Republican', which examines the lack of African Americans in the Republican Party? 
Sentence (from "Fear of a Black Republican"): Produced over six years by the married filmmaking team of Kevin and Tamara Williams, the film takes a non-partisan point-of-view of the American two-party political system and why the Republican Party has so few Black and Urban supporters.
Relevant evidence: No