Question: Ed is an NBC television program co-produced by an American television comedian, writer, and producer who hosted a late night television talk show for how long?
Sentence (from "David Letterman"): He hosted a late night television talk show for 33 years, beginning with the February 1, 1982 debut of "Late Night with David Letterman" on NBC, and ending with the May 20, 2015 broadcast of "Late Show with David Letterman" on CBS.
Relevant evidence: Yes