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 "An American Opera"): is a multi-award-winning documentary film by Tom McPhee chronicling the events following Hurricane Katrina in New Orleans, Louisiana when pet owners were forced to evacuate without their pets.
Relevant evidence: No