Question: What is the birthdate of this American business magnate, investor, and philanthropist, who is featured in the documentary Nobody Speaks: Trials of the Free Press, regarding his secret purchase of the Las Vegas Review Journal?
Sentence (from "Paul Allen"): As of June 2017, he is estimated to be the 46th richest person in the world, with an estimated net worth of $20.7 billion.
Relevant evidence: No