Question: Who was the first Irish playwright of note to write about the Dublin working classes, Colson Whitehead or Seán O'Casey ?
Sentence (from "Colson Whitehead"): He is the author of six novels, including his debut work, the 1999 novel "The Intuitionist", and "The Underground Railroad" (2016), for which he won the 2016 National Book Award for Fiction and the 2017 Pulitzer Prize for Fiction.
Relevant evidence: No