Question: Both Richard Williams and Melville Shavelson served as President of the WGAw?
Sentence (from "Richard Williams (animator)"): Richard Edmund Williams (born March 19, 1933) is a Canadian–British animator, voice artist, and writer, best known for serving as animation director on Disney/Amblin's "Who Framed Roger Rabbit" and for his unfinished feature film "The Thief and the Cobbler".
Relevant evidence: Yes