David Letterman
Table:
David Letterman

Letterman in May 2016

Birth name	David Michael Letterman
Born	(1947-04-12) April 12, 1947 (age 78)
Indianapolis, Indiana, U.S.
Medium	Stand-up, television, film
Alma mater	Ball State University
Years active	1970–present
Genres	Observational comedy, satire, deadpan, self-deprecation
Subject(s)	American culture, politics, everyday life, current events, human behavior
Spouse

Michelle Cook

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(m. 1968; div. 1977)​

Regina Lasko

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(m. 2009)​

Children	1
Notable works and roles

The David Letterman Show (host; 1980)

Late Night with David Letterman (host; 1982–1993)

Late Show with David Letterman (host; 1993–2015)

My Next Guest (2018–)

Signature

Based on the table, identify if the claim is entailed, neutral, or refuted. Give your final answer in JSON format {"answer": "YOUR ANSWER"}.

Assertion: David Letterman started his career in his twenties.

answer: entailed