Question: Which American screen and stage actor, who appeared in "Casablanca" also appeared in the 1951 British-American adventure film "The African Queen"? 
Sentence (from "Stephen Lang"): He is known for roles in films including "Manhunter" (1986), "Gettysburg" (1993), "Gods and Generals" (2003), "Public Enemies" (2009) and "Don't Breathe" (2016).
Relevant evidence: No