Question: What type of films are both 'Murderball' and 'Welcome to Nollywood'? 
Sentence (from "Welcome to Nollywood"): Welcome to Nollywood is a 2007 documentary film directed by Jamie Meltzer, which premiered at the Full Frame Documentary Film Festival, and also played at the Avignon Film Festival and the Melbourne International Film Festival in the summer of 2007.
Relevant evidence: Yes