Question: What is the difference between Joss Whedon and Sylvester Stallone as directors? 
Sentence (from "Sylvester Stallone"): He is well known for his Hollywood action roles, including boxer Rocky Balboa, the title character of the "Rocky" series' seven films from 1976 to 2015; soldier John Rambo from the four "Rambo" films, released between 1982 and 2008; and Barney Ross in the three "The Expendables" films from 2010 to 2014.
Relevant evidence: Yes